On December 1, 2025, BYD Auto Japan, a major Chinese electric vehicle manufacturer, launched the long-awaited plug-in hybrid SUV “BYD SEALION 6” in the Japanese market. Equipped with BYD’s proprietary super hybrid technology “DM-i (Dual Mode Intelligence),” which is being introduced for the first time in Japan, the car has attracted attention for its competitive pricing: 3,982,000 yen for the front-wheel drive model and 4,488,000 yen for the four-wheel drive model.
BYD SEALION 6 to be officially launched on December 1, 2025
Advance reservations, which began on November 1st during the Japan Mobility Show 2025, had reached approximately 300 units as of the end of November, indicating growing demand for PHEVs in the Japanese market.
Features of the BYD SEALION 6: Hybrid system with electricity as the main driver
What is DM-i Technology?
BYD is a pioneer in hybrid technology, having launched the world’s first mass-produced plug-in hybrid vehicle in 2008. As a result of more than 20 years of research and development, the company now offers its plug-in hybrid series in over 90 countries and regions, with cumulative sales exceeding 7.4 million units.
The new Sea Lion 6 is equipped with DM-i, a super hybrid technology that has evolved over more than 17 years. It is comprised of the following three elements:
- A 1.5L highly efficient engine boasting the world’s highest level of thermal efficiency
- FWD model: Naturally aspirated engine (thermal efficiency 43.04%)
- AWD model: Turbo engine (thermal efficiency 40.12%)
- DM-i dedicated blade battery for high output
- Battery capacity: 18.3 kWh
- Lithium phosphate battery that will not ignite or burst into flames even when subjected to strong impacts
- Highly efficient electric hybrid system (EHS)
- A design that is primarily electric, with the motor handling most of the driving
Two grades available: FWD and AWD
BYD SEALION 6 (front-wheel drive model)
Price: 3,982,000 yen (tax included)
- Engine : 1.5L naturally aspirated (maximum output 72kW/6000rpm, maximum torque 122Nm)
- Motor : Maximum output 145kW, maximum torque 300Nm
- 0-100km/h acceleration : 8.5 seconds
- Range : up to 1,200 km
- EV driving range : 100km when fully charged
- Hybrid fuel economy : 22.4km/L (WLTC mode)
- Delivery start : Scheduled for the end of January 2026
BYD SEALION 6 AWD (four-wheel drive model)
Price: 4,488,000 yen (tax included)
- Engine : 1.5L turbo (maximum output 96kW, maximum torque 220Nm)
- Motor : Maximum output 270kW (front/rear), maximum torque 550Nm (front/rear)
- 0-100km/h acceleration : 5.9 seconds (Australian reference value)
- Drive system : four-wheel drive
- Delivery start : March 2026
The FWD model prioritizes optimal cruising performance for long-distance driving, while the AWD model offers powerful acceleration typical of a sports SUV. Two options are available to meet a wide range of needs, from everyday use to weekend leisure trips and long-distance drives.
Price comparison with competitors: Amazing value for money
The biggest appeal of the new Sea Lion 6 is its price, which is about 1 million yen cheaper than PHEV models in the same class. Its price advantage is clear when compared to the Toyota Harrier PHEV (about 5.29 million yen) and Mitsubishi Outlander PHEV (about 5.47 million yen).
The fact that it is priced comparable to regular hybrid vehicles, and that it has plug-in functionality and an EV range of 100km, will be a big attraction for users who prioritize cost-effectiveness.
Exterior design: elegant proportions and advanced design
BYD SEALION 6
Differentiated front design
The new Sea Lion 6 uses a dedicated body design that is different from the Sea Lion 7, an EV model in the same marine series. While the EV model uses a closed grille to minimize cooling, the PHEV model Sea Lion 6 has slit-shaped air intakes to ensure engine cooling performance.
The flowing horizontal front features the sharp and striking “Ocean X Face” design, creating a dynamic impression.
Body size and practicality
- Length x width x height : 4,775 x 1,890 x 1,670 mm
- Wheelbase : 2,765mm
- Vehicle weight : 1,940 kg (FWD) / 2,100 kg (AWD)
- Minimum turning radius : 5.55m
Its size is similar to that of the Toyota Harrier (length 4,740mm x width 1,855mm x height 1,660mm, wheelbase 2,690mm), making it suitable for Japan’s road environment and parking lots. Compared to the EV model, the Sea Lion 7, the overall length has been shortened while the overall height has been increased, improving interior space and usability.
Rear design and wheels
The rear features single-character taillights that emphasize the three-dimensional effect through the use of light. The slope of the roof and windows has been reduced from the EV model to expand the interior space and improve practicality. The vehicle is equipped with 19-inch black aluminum wheels, and combined with the powerfully styled bumper, it creates an SUV-like presence.
Interior design: high-quality and functional interior space
BYD SEALION 6
Modern design inspired by the sea
The interior features a deep black base with brown accents and ambient lighting, creating a modern design befitting the Marine series. Sports seats with a form inspired by the ocean are used, and are designed to provide firm support for the body while allowing passengers to maintain a comfortable posture even over long distances.
Front seat comfort features
- Electric sports seats (heated/ventilated)
- Heated steering wheel
- Crystal-like electric shift lever
- Wireless charging that can connect two devices simultaneously
- 15.6-inch high-definition large display
Latest infotainment system
The large, high-resolution 15.6-inch display located in the center of the car is combined with the latest infotainment system to provide intuitive operability. It also supports Apple CarPlay and Android Auto, allowing for seamless integration with smartphones.
The advanced voice control recognizes and responds to speech from all seats, allowing you to safely operate various functions while driving.
Rear seats and luggage space
The 2,765mm wheelbase ensures ample rear seat space for adults to sit comfortably. The luggage capacity is 425L under normal conditions, but can be expanded to 1,440L by folding down the rear seats. The flat floor and large luggage compartment opening make it highly practical.
Panoramic sunroof
A one-touch open/close panoramic sunroof is standard equipment, creating an open and airy interior space. Highly sound-insulating glass is used to ensure quietness.
Powertrain details: World’s highest level of thermal efficiency
FWD model powertrain
The 1.5L naturally aspirated engine (BYD472QA) achieves the world’s highest level of thermal efficiency at 43.04%. It generates a maximum output of 72kW/6000rpm and a maximum torque of 122Nm/4000-4500rpm, and when combined with a motor with a maximum output of 145kW and a maximum torque of 300Nm, it provides a smooth and powerful ride.
AWD model powertrain
The 1.5L turbo engine produces a maximum output of 96kW and a maximum torque of 220Nm. The two motors positioned at the front and rear produce a combined maximum output of 270kW and a maximum torque of 550Nm, achieving the performance expected of a sports SUV, with acceleration from 0 to 100km/h in 5.9 seconds.
Blade Battery Safety
BYD’s proprietary lithium phosphate battery, the “Blade Battery,” is an innovative technology that prevents fire or bursting into flames even when subjected to a strong impact, such as penetrating the battery pack, and also has high energy density. With a capacity of 18.3 kWh, the FWD model can travel 100 km on a full charge.
Fuel efficiency: Daily use can be completed with electricity only
WLTC mode fuel economy (FWD model)
- Hybrid fuel economy : 22.4km/L
- Urban mode: 26.4km/L
- Suburban mode: 22.8km/L
- Highway mode: 20.8km/L
- AC power consumption rate : 153Wh/km
- Urban mode: 129.5Wh/km
- Suburban mode: 138.3Wh/km
- Highway mode: 173.7Wh/km
Practical cruising performance
With an EV range of 100km on a full charge, daily commutes, shopping trips, and other trips can be completed almost entirely on electricity. By optimally combining engine power generation and driving for long-distance travel, the FWD model achieves a maximum range of 1,200km. This electric powertrain eliminates range concerns for users and combines comfort and efficiency.
Charging performance and power supply function: V2L/V2H compatible
Charging performance
- Normal charging : up to 6kW
- Fast charging : up to 18kW
It can be charged using a 200V household power outlet, and also supports rapid charging on the go, allowing for flexible charging plans.
V2L/V2H function
- V2L (Vehicle to Load) : Power supply function to outside the vehicle
- V2H (Vehicle to Home) : Power supply function to the home
The vehicle can be used as a power source in a wide range of situations, such as using electrical equipment outdoors or as an emergency power source in the event of a disaster. This function takes advantage of the strengths of a PHEV equipped with a large-capacity battery.
Body color lineup
The new Sea Lion 6 is available in four exterior paint colours inspired by the colours of the sea:
- Cosmos Black
- Stone Gray
- Harbor Gray
- Arctic White
The interior color is a unified combination of brown and black, creating a sophisticated and calm atmosphere. All body colors are available for both grades.
Safety equipment and driver assistance systems
The new Sea Lion 6 is equipped with the latest safety equipment and driver assistance systems. Details are scheduled to be announced in the future, but like other BYD models, it is expected to be equipped with a full range of advanced driver assistance systems (ADAS).
suspension
- Front : MacPherson strut
- Rear : Multi-link
The suspension is well-balanced, providing both a comfortable ride and excellent handling stability.
Brake system
- Front : Ventilated disc
- Rear : Solid disc
Combined with large diameter 19-inch wheels (tire size 235/50 R19), it ensures reliable braking power.
BYD’s strategy for the Japanese market: Diversifying lineup
The new Sea Lion 6 will be BYD’s fifth model introduced in the Japanese market. By introducing the PHEV model Sea Lion 6 in addition to the existing EV models (ATTO3, Dolphin, Seal, Sea Lion 7), BYD is approaching a wider range of users.
BYD’s Strengths
- Technical capabilities founded in the battery business
- Sales record in over 70 countries and regions worldwide
- Approximately 70% share of the Japanese EV bus market
- Will surpass Tesla as the world’s top EV sales performer in the first half of 2022
- Reliability through a joint venture with Toyota
Future developments
By introducing plug-in hybrid vehicles, sales of which are growing worldwide, to Japan, BYD will be able to attract users who are hesitant to switch to full EVs due to concerns about the state of charging infrastructure and driving range. The introduction of more PHEV models, such as the “SEAL 06 DM-i,” is expected in the future.
Comparison with competitors
Toyota Harrier
Harrier PHEV
- Length x width x height : 4,740 x 1,855 x 1,660 mm
- Wheelbase : 2,690mm
- Price range (hybrid): From approximately 3.4 million yen
- Price range (PHEV): From approximately 5.29 million yen
The new Sea Lion 6 has a body size roughly the same as the Harrier, but with a starting price of 3.98 million yen for the PHEV model, it offers excellent cost performance.
Mitsubishi Outlander PHEV
Outlander PHEV
- Price range : From approximately 5.47 million yen
- EV driving range : Approximately 83km
The new Sea Lion 6 is about 1.5 million yen cheaper than the Outlander PHEV, and has a longer EV driving range of 100km.
Summary: A next-generation SUV for under 4 million yen
The BYD New Sea Lion 6 is a noteworthy model for the following reasons:
Key Points
- Price competitiveness : A high-cost performance PHEV available from 3,982,000 yen
- Cruising range : FWD model up to 1,200km, EV driving 100km
- Acceleration : 0-100km/h in 5.9 seconds for AWD models
- Fully equipped : 15.6-inch display, panoramic sunroof, V2L/V2H function
- The world’s highest level of thermal efficiency : 43.04%
- Safety : High safety thanks to the blade battery
- Practicality : The same size as the Harrier, with a luggage compartment that can be expanded to 1,440 liters
Recommended for:
- Those who value cost performance
- Those who want to use electric vehicles for everyday use and engine vehicles for long distances
- People who are hesitant to buy an EV due to concerns about charging infrastructure
- Those who want to use it as an emergency power source in the event of a disaster
- People who are interested in advanced technology
Delivery time
- FWD model : Scheduled for the end of January 2026
- AWD model : Scheduled for March 2026
Orders are now being accepted at authorized BYD dealers nationwide. Approximately 300 units have already been reserved since pre-orders began, and there is a possibility of waiting for delivery, so if you are considering purchasing one, we recommend making your reservation early.
Frequently Asked Questions (FAQ)
Q1. Can the BYD SEALION 6 use regular gasoline?
A1. Yes, it uses unleaded regular gasoline. Since it is not a high-octane specification, fuel costs are kept low.
Q2. Can I use it as a hybrid vehicle without charging it?
A2. Yes, it is. Even without charging, it can run at a hybrid fuel efficiency of 22.4km/L. However, it will be more economical if you charge it and use electricity.
Q3. What is the warranty?
A3. For details, please contact an authorized BYD dealer. BYD is generally known for providing generous warranties.
Q4. Should I choose FWD or AWD?
A4. If you prioritize fuel economy and range and mainly drive on paved roads, we recommend FWD. If you frequently drive on snowy or rough roads and require better acceleration, consider AWD.
Q5. Which should I choose, the EV model Sea Lion 7 or the Sea Lion 6?
A5. If you travel short distances every day, have charging facilities at home, and want a fully electric vehicle, then the Sea Lion 7 is the way to go. If you travel long distances often and are concerned about the charging infrastructure, then the Sea Lion 6 is recommended.
With the arrival of the new Sea Lion 6, competition in Japan’s PHEV market is expected to intensify. It will be interesting to see how BYD’s next-generation hybrid technology, DM-i, is received by Japanese users.
