The TOUGH LIGHT MONSTER2, based on the SEABORG 400J, offers even greater durability.
Equipped with a highly durable, high-power MAGMAX-G motor, it offers four times the durability of the standard model. It delivers a responsive feel and powerful performance.
Thanks to its high durability, you can not only target large fish of a higher calibre, but also use electric Jigging to catch fish such as dragonfish, yellowfin tuna and Amberjack.
SEABORG G400JSEABORG G400J
Lightweight and sensitive: ‘TOUGH LIGHT MONSTER²’ – Suitable for electric Jigging / Highly durable (G = 3-year motor warranty) / High power / Lightweight at 600g
DAIWA Technology

JOG POWER LEVER
The power lever has been repositioned to the centre of the body, and its design has been changed from a lever to a jog dial style. This allows the angler to perform reeling and engage or disengage the clutch using just the thumb of the hand holding the Rod, completely freeing the other hand from operating the lever so that the angler can concentrate fully on handling the Rod. This flexible one-thumb operation enables precise control of the lever, allowing the angler to adjust the reeling speed at will.

MAGSEALED BALL BEARING
Using its proprietary technology, DAIWA has succeeded in becoming the first in the world to apply MAGSEALED technology to the ball bearing itself. A wall of magnetic fluid prevents water and foreign particles from entering the interior of the ball bearing, thereby significantly reducing rust, salt deposits and abnormal noises whilst maintaining the ball bearing’s inherent rotational performance.

MAGMAX-G MOTOR
A slide-brush motor featuring special neodymium magnets, offering excellent responsiveness and durability.
It offers excellent burst power, whilst the motor’s durability is four times that of the previous MAGMAX model. Winding is entirely at the angler’s command. Furthermore, thanks to its high torque, slow reeling is a breeze.
* 3-year, 300 km motor warranty (new warranty certificate)
*FF MAGMIGHT Structure*
It offers excellent burst power, whilst the motor’s durability is four times that of the previous MAGMAX model. Winding is entirely at the angler’s command. Furthermore, thanks to its high torque, slow reeling is a breeze.
* 3-year, 300 km motor warranty (new warranty certificate)
*FF MAGMIGHT Structure*
Product Details
Aluminium JOG Power Lever
Made from aluminium, it offers excellent grip, making winding more comfortable even with wet fingers. Furthermore, the JOG power lever allows for intuitive hook-setting and speed control.
MAGSEALED ball bearings
Used on the spool shaft on the side plate side, which is difficult to maintain and most prone to salt build-up. This helps to maintain the initial performance of the spool’s free-running action and winding efficiency.
MAGMAX-G motor (3-year, 300 km warranty)
A slide-brush motor featuring special neodymium magnets, offering excellent responsiveness and durability.
It offers excellent burst power, whilst the motor’s durability is four times that of the conventional MAGMAX. Winding is as effortless as the angler wishes. Furthermore, thanks to its high torque, slow reeling is a breeze.
* 3-year, 300 km motor warranty (new warranty certificate)
*FF Magmaite Structure*
It offers excellent burst power, whilst the motor’s durability is four times that of the conventional MAGMAX. Winding is as effortless as the angler wishes. Furthermore, thanks to its high torque, slow reeling is a breeze.
* 3-year, 300 km motor warranty (new warranty certificate)
*FF Magmaite Structure*
One-handed, comfortable operation: JOG system
Fall Brake Dial
A braking system that allows the descent speed to be adjusted instantly.
With a 180-degree range, you can control everything from Spool FREE to maximum brake with just your thumb.
Not only does it prevent Backlash, but it also allows you to feel the Bait taking the Bait during Bottom Fishing, without having to use your finger to set the hook, and to detect bites from Fish during the Fall.
With a 180-degree range, you can control everything from Spool FREE to maximum brake with just your thumb.
Not only does it prevent Backlash, but it also allows you to feel the Bait taking the Bait during Bottom Fishing, without having to use your finger to set the hook, and to detect bites from Fish during the Fall.
Dot-matrix LCD counter
・The on-screen prompts are clear, and you don’t need a manual to adjust the various settings.
*Menu screen: Press and hold ‘PICKUP’ and ‘MEMO’ simultaneously for 2 seconds
・Large text that is easy to read in the field, with excellent visibility even in backlight conditions
*The image remains clear even when wearing polarised sunglasses. With conventional LCD screens, the image appears as a solid black and is not visible.
・Do not use the electric winding machine at depths of 00 or less ⇒ this eliminates the risk of the line becoming entangled
・Displays D-Vec when the power is switched on
*Menu screen: Press and hold ‘PICKUP’ and ‘MEMO’ simultaneously for 2 seconds
・Large text that is easy to read in the field, with excellent visibility even in backlight conditions
*The image remains clear even when wearing polarised sunglasses. With conventional LCD screens, the image appears as a solid black and is not visible.
・Do not use the electric winding machine at depths of 00 or less ⇒ this eliminates the risk of the line becoming entangled
・Displays D-Vec when the power is switched on
Jigging Mode
You can choose from three basic auto-jerk (standard) patterns.
1. Single-pitch Jigging (repeating a standard single-stage Jigging)
2. One-pitch pose (repeat the jerk pattern from 1 followed by a pause)
3. Combi-jerk (repeat a steady reeling followed by a single jerk)
You can also set your own custom jerk patterns using the custom selection option. A pocket manual is included.
1. Single-pitch Jigging (repeating a standard single-stage Jigging)
2. One-pitch pose (repeat the jerk pattern from 1 followed by a pause)
3. Combi-jerk (repeat a steady reeling followed by a single jerk)
You can also set your own custom jerk patterns using the custom selection option. A pocket manual is included.
Motor ON/OFF-linked clutch
[When winding the JOG power lever]
1. Clutch ON ⇒ Electric winding
2. Clutch OFF ⇒ Motor OFF
[Advantages]
1. Smooth winding start-up with good responsiveness when the clutch is engaged
2. Makes it easier to detect bites during the Fall
[Points to Note]
1. Thanks to the reinforced clutch, ON/OFF operation is also possible during maximum winding.
2. Can be operated at depths of 9 metres or more below the counter
3. Do not operate the automatic line feed mechanism. (There is no automatic line feed setting.)
1. Clutch ON ⇒ Electric winding
2. Clutch OFF ⇒ Motor OFF
[Advantages]
1. Smooth winding start-up with good responsiveness when the clutch is engaged
2. Makes it easier to detect bites during the Fall
[Points to Note]
1. Thanks to the reinforced clutch, ON/OFF operation is also possible during maximum winding.
2. Can be operated at depths of 9 metres or more below the counter
3. Do not operate the automatic line feed mechanism. (There is no automatic line feed setting.)
Level Wind Compatible with Futoshi Shock Leaders
A level wind (inner diameter 3.0 mm) through which a PE No. 5 + Fluoro No. 30 FG knot passes with ease
*Maximum nylon Leader size: No. 60
*Suitable for tonjigi, yellowtail and amberjack jigging
*Maximum nylon Leader size: No. 60
*Suitable for tonjigi, yellowtail and amberjack jigging
Depth Alarm
・An audible alarm sounds every 10 metres during Fall (FL) and winding (UP)
・Three patterns available for each (can also be set to OFF)
1. FL/UP1: One alarm every 10 metres
2. FL/UP2: 10 metres once, 20 metres twice, 30 metres three times, repeated
3. FL/UP: 1 x 10 m, ... 5 x 50 m (repeat)
・Three patterns available for each (can also be set to OFF)
1. FL/UP1: One alarm every 10 metres
2. FL/UP2: 10 metres once, 20 metres twice, 30 metres three times, repeated
3. FL/UP: 1 x 10 m, ... 5 x 50 m (repeat)
The sound of the drag being pulled out
Choose from three types of drag sound effects (can also be switched off)
Pattern 1: High-pitched sound (as supplied)
Pattern 2: Mid-range
Pattern 3: Bass
Pattern 1: High-pitched sound (as supplied)
Pattern 2: Mid-range
Pattern 3: Bass
■High durability / High power – Suitable for electric Jigging
・High durability: MAGMAX-G motor (3-year, 300 km warranty on the motor only)
4 times the durability (23SB400J: compared with MAGMAX motor)
High-response thanks to its high-magnetic-force brush motor
・High power
Drag Force: max. 16 kg
・High durability: MAGMAX-G motor (3-year, 300 km warranty on the motor only)
4 times the durability (23SB400J: compared with MAGMAX motor)
High-response thanks to its high-magnetic-force brush motor
・High power
Drag Force: max. 16 kg
■Lightweight and compact: Lightness equals sensitivity
・Weight: ‘600g’
・Small, compact body
Low-profile/narrow form & screwless body
・Weight: ‘600g’
・Small, compact body
Low-profile/narrow form & screwless body
■ Comfortable operation
・Motor ON/OFF-linked clutch
・‘Aluminium JOG power lever’ allows for precise control even with wet fingers
・‘ATD’ for smooth, continuous performance
Maximum drag: 16 kg (5 carbon washers)
・Waterproof and durable technology: ‘MAGSEALED Ball Bearing’
・Instantly set your descent speed with the ‘Fall Brake Dial’
・‘Dot-matrix LCD counter’ with excellent visibility
・Hand-reeling setup designed with Jigging in mind
One turn of the handle: 83 cm (Gear ratio 6.0) / 75–85 mm adjustable handle arm / aluminium round Knob
Level wind inner diameter 3.0 mm: Compatible with No. 30 shock leader
・Motor ON/OFF-linked clutch
・‘Aluminium JOG power lever’ allows for precise control even with wet fingers
・‘ATD’ for smooth, continuous performance
Maximum drag: 16 kg (5 carbon washers)
・Waterproof and durable technology: ‘MAGSEALED Ball Bearing’
・Instantly set your descent speed with the ‘Fall Brake Dial’
・‘Dot-matrix LCD counter’ with excellent visibility
・Hand-reeling setup designed with Jigging in mind
One turn of the handle: 83 cm (Gear ratio 6.0) / 75–85 mm adjustable handle arm / aluminium round Knob
Level wind inner diameter 3.0 mm: Compatible with No. 30 shock leader
■ Further details
[Handle Knob]】
・L size available
[Rod Clamp]】
・Cannot be fitted (no options available)
[Handle Knob]】
・L size available
[Rod Clamp]】
・Cannot be fitted (no options available)
■Warranty Certificate
① Warranty period (all products)
・One year from the date of purchase
・Usage time: 200 hours or less
・Total winding distance of 100 km or less
② Special Warranty (Motor only)
・Three years from the date of purchase
・Total winding distance of 300 km or less
① Warranty period (all products)
・One year from the date of purchase
・Usage time: 200 hours or less
・Total winding distance of 100 km or less
② Special Warranty (Motor only)
・Three years from the date of purchase
・Total winding distance of 300 km or less
■User Manual
・Quick Start Guide (Japanese) included
・Pocket manual (explaining the three Jigging modes) included
・Online Manual (Japanese, English, Traditional Chinese, Simplified Chinese, Korean)
・HP product page (Japanese)
・Book (SLP sold separately for ¥500)
・Quick Start Guide (Japanese) included
・Pocket manual (explaining the three Jigging modes) included
・Online Manual (Japanese, English, Traditional Chinese, Simplified Chinese, Korean)
・HP product page (Japanese)
・Book (SLP sold separately for ¥500)
IC Counter Menu
| Menu | Operations |
|---|---|
| Main Line Input | P1 / P2 / P3 *Can be set from PE No. 0.6 upwards *P3: Can be set to 30m + 30m |
| Sub-counter | Counter from the bottom / Winding speed display / Remaining winding time display |
| FUNE Brake Stop | 1 m to 5 m range |
| Jigging mode | 3 types / OFF |
| Quick Reeling / Stop | Quick Reeling / Stop / OFF |
| Drag sound | 3 types / OFF |
| Depth Alarm | 3 types / OFF |
| Alarm sound | ON/OFF |
| Constant-speed winding | ON/OFF |
| Timer winding | ON/OFF |
| Free-spool mode | ON/OFF *Fukase clutch not included |
| Water Depth Correction | Water Depth Counter Correction |
| Fishing History | Distance/Time Used |
| Language | Japanese/English/Traditional Chinese/Simplified Chinese/Korean |
| Units | m/ft |
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Further details on features and specifications
| Features and Specifications | Features |
|---|---|
| Die-cast aluminium body | The high-rigidity, low-deformation aluminium body firmly supports the drive section, including the motor, to facilitate powerful fighting. |
| Infinite | A mechanism that eliminates play during manual reeling, delivering a smooth reeling feel similar to that of a manual reel. |
| Ultra Spool FREE | High-speed rig-dropping performance achieved by disengaging the gears between the spool and the motor unit to eliminate resistance to spool rotation. |
| Constant-Speed Winding Mode | A convenient feature that automatically adjusts the reeling speed in response to changes in the load on the reel, ensuring reeling is always performed at a set, constant speed to prevent fish from escaping. |
| Electric Slow Winding | A function that enables ‘slow reeling’, a technique said to be effective for a variety of target fish. This sets the speed to ‘slow’ within the electric winding speed adjustment range when operating at low speeds. |
| Display Calibration Function | A function that allows you to easily correct the counter display whilst fishing if it becomes misaligned with the line colour. |
| Top-to-Bottom/Bottom-to-Top Counter | As water depth can be measured from both the surface and the bottom, you can find the correct depth accurately in any situation and for any target fish. |
| Quick Reeling / Stop Switch | A ‘Quick Retrieve’ function that allows you to reel in at a preset speed simply by pressing a switch, useful for finding the depth or taking up Slack Lines. This is used in conjunction with the ‘Quick Stop’ switch. |
| Timer & Timer Winding | A timer with a display function that allows you to accurately track the time your Rig has been in the water. You can set the time from when the Rig is cast until it is retrieved, and it is automatically retrieved by the motor. The timer winding function enables precise and efficient handling. |
| Actual Winding Speed Display | A function that displays the actual winding speed per minute. This serves as a useful guide to the speed during winding. |
| Selectable Gunwale Stop | A function that automatically stops the electric reeling once the line has been reeled in to the set length. Setting this to a convenient length for retrieval doubles your efficiency and helps prevent line entanglement, a major cause of Rod damage. |
| Slow Stop at the Gunwale | A function that ensures the electric winding stops gradually when reaching the gunwale, thereby preventing fish from being lost due to the impact. |
| Washable | Can be washed with water using a neutral detergent (however, submersion and the use of hot water are strictly prohibited). |
| Alarm ON/OFF | The alarm and switch sounds can be switched on or off. |
| Memory backup function | A backup function that retains the settings selected in each mode for your next fishing trip. |
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VIDEO
Accessories
Quick Guide
Pocket Guide (Explanation of the Three Jigging Modes)
Warranty Certificate
Pocket Guide (Explanation of the Three Jigging Modes)
Warranty Certificate
Product Specifications
| DESCRIPTION | Standard weight (g) | Line per handle turn (cm) | Gear ratio | Standard reel capacity: Nylon (No. – m) | Standard reel capacity (PE, No.-m) | Bearings (BB/RB) | Maximum Drag Force (kg) | Maximum winding power (kg) | Normal winding speed with a 1 kg load (m/min) | JAFS Standard Winding Power (kg) | JAFS Standard Winding Speed (m/min) | Handle Knob |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| SEABORG G400J | 600 | 83 | 6.0 | 6–300_7–230 | 3-500_4-400_5-300_6-230 | 18/1 | 16 | 59(65) | 146(162) | 14 | 190 | Aluminium Round L |
| SEABORG G400JL | 600 | 83 | 6.0 | 6–300_7–230 | 3-500_4-400_5-300_6-230 | 18/1 | 16 | 59(65) | 146(162) | 14 | 190 | Aluminium Round L |
- The manufacturer's suggested retail price is listed excluding tax.
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*The reel capacity is a guide only and may vary depending on the manufacturer, items and line tension.
*The retrieve length is the amount of line wound in with each handle rotation.
*The maximum winding power is a reference value based on a supply voltage of 13 V and shaft torque. *kg = kgf·cm (for the Mega Twin mechanism, this refers to the power range)
*The standard winding speed is the average speed at which 100 m is wound with a 1 kg load at a supply voltage of 13 V.
*The JAFS standard winding power (power range for the Mega Twin mechanism) and speed are approximate values based on the regulations of the Japan Fishing Tackle Manufacturers Association, assuming a supply voltage of 13V.
*The JAFS standard winding speed refers to the value measured at a supply voltage of 13V in accordance with the Japan Fishing Tackle Manufacturers Association standards. It is the winding speed under no-load conditions at the outer diameter of the Spool.
*The figures in brackets are approximate values based on the use of Super Lithium.
*Regarding the power supply*
This electric reel is compatible with 12V to 16.8V direct current (DC). It cannot be used with power sources outside the specified range, such as 100V alternating current (AC) from a domestic mains supply or 24V DC from boat equipment. Furthermore, due to generators and wiring, the voltage of a boat power supply can easily become unstable, which may cause the reel’s protection circuit to activate, resulting in the reel stopping or rotating intermittently. To ensure the reel performs to its full potential, please use a genuine Daiwa battery designed for electric reels (please check ‘View Details’ for compatible batteries).
This electric reel is compatible with 12V to 16.8V direct current (DC). It cannot be used with power sources outside the specified range, such as 100V alternating current (AC) from a domestic mains supply or 24V DC from boat equipment. Furthermore, due to generators and wiring, the voltage of a boat power supply can easily become unstable, which may cause the reel’s protection circuit to activate, resulting in the reel stopping or rotating intermittently. To ensure the reel performs to its full potential, please use a genuine Daiwa battery designed for electric reels (please check ‘View Details’ for compatible batteries).