【2026 Latest】A Thorough Comparison of Sun Emperor Electric Mobility! Differences Between Easy, SUNRIN, and LBIRD, and How to Choose the Best One

"Special Small Motorized Bicycles" (Tokutei Kogata Gentusku) are now compliant with Japan's new Road Traffic Act, allowing individuals aged 16 and over to ride them without a license, and helmet use is only a recommended effort. Among numerous brands, Sun Emperor, developed by Ryusho Co., Ltd. (Nagoya City), a domestic manufacturer with deep knowledge of Japan's road conditions, boasts explosive popularity due to its high safety and excellent design.

Sun Emperor's biggest feature is that, unlike typical stand-up electric kick scooters, it is based on a "seated" type with a saddle, which Japanese people are familiar with. Furthermore, it offers an overwhelmingly rich variety not found in other companies, with 2-wheel (Easy), 3-wheel (SUNRIN), and the latest 4-wheel (LBIRD) options, to suit users' lifestyles.

However, when it comes to purchasing, many people find themselves wondering, "What are the differences between each model?" or "Which one is best for my needs?" Each model has clear character differences in terms of price, cruising range, size, and driving stability.

In this article, we will thoroughly compare the specifications, pros and cons, and operational differences of Sun Emperor's three main models (Easy / SUNRIN / LBIRD), and provide a comprehensive purchase guide of over 3,000 characters to help you find the perfect one!

1. At a Glance! Sun Emperor Key 3 Model Spec Comparison Chart

First, let's check the basic performance, size, and key figures of each model in a table. All models are certified as "compliant with safety standards" and can legally run on public roads in Japan.

2. Detailed Explanation of Each Model and its Pros and Cons

Next, let's delve into the unique advantages of each vehicle and the disadvantages to be aware of before purchasing.

① Features of [2-wheel] Sun Emperor Easy

The undisputed best-seller of Sun Emperor, often described as the perfected form of special small motorized bicycles, is the "Easy". It combines a smart bicycle-like form with the endurance of a moped.

• Pros: Its greatest asset is an amazing cruising range of "approximately 80km." There's almost no worry about running out of battery, even for long commutes to work or school. It also boasts light handling and excellent maneuverability unique to a two-wheeler, and the frame can be folded in half to fit in a car trunk.
• Cons: Like a bicycle, it's a two-wheeled vehicle, so it doesn't stand on its own when completely stopped. A kickstand is required. Also, for elderly people who are unsure about two-wheel riding (balancing), it might feel a bit daunting at first.

② Features of [3-wheel] Sun Emperor SUNRIN

The 3-wheel model, "SUNRIN," was developed in response to users who said, "I'm afraid of falling over on stand-up kick scooters or two-wheelers." It adopts a trike style with one front wheel and two rear wheels.

• Pros: With two wheels at the rear, stability is outstanding during low-speed riding (such as in 6km/h sidewalk mode). It features independent suspension, which prevents the vehicle from tilting easily on rough roads and minimizes the risk of overturning. The reverse function allows for easy maneuvering in tight parking spaces while seated.
• Cons: Compared to the 2-wheel Easy, the vehicle weight is slightly heavier, and its width (tread) means it's not suitable for weaving through very narrow alleys. Also, only the handlebar folds, so more space is needed when loading it into a car.

③ Features of [4-wheel] Sun Emperor LBIRD

In 2026, the latest model to shake up Japan's mobility industry is the 4-wheel special small motorized bicycle, "LBIRD." It's an entirely new mode of transportation that combines the ease of use of a senior car (electric wheelchair) with the comfort of a special small motorized bicycle.

• Pros: With four tires always gripping the ground, it boasts overwhelming traction and ultimate stability, never tipping over even when stationary. It's ideal as a new mode of transportation for seniors after returning their driver's licenses. It has large cargo space at the feet and in the center, suitable for grocery shopping or co-riding with pets using a dedicated bag.
• Cons: Due to its 4-wheel structure, it cannot be folded. Storage requires about 1.5 times the space of a typical bicycle. Also, the maximum speed is limited to 20km/h, so it's not a vehicle for young people seeking speed.

3. 【By Purpose】How to Choose the Perfect Sun Emperor for You

Ryusho Co., Ltd., a domestic manufacturer, offers such a diverse range of models because users have completely different "purposes for riding." Choose the model that best suits you from the following situations.

Case A: For daily commuting, school, or travel over 5km one way, "Easy" is the only choice.

For active business people and students who "want to shorten their commute to the station" or "want to save on gas and train pass fees," Easy is the ideal choice. It has the endurance to cover long distances at 20km/h, and in case you need to take it into an office or apartment elevator, it folds compactly for easy portability, making it a perfect fit for an urban lifestyle.

Case B: For local shopping, if you're a bit unsure about your balance, "SUNRIN" is recommended.

For those who "want to use it for daily shopping but are afraid of a wobbly two-wheeler with luggage," SUNRIN is highly recommended. Even with a lot of luggage in the standard-equipped large rear basket, the two rear wheels firmly support the vehicle. When stopping at a red light, there's almost no need to put your feet on the ground, making it popular for those who want to reduce strain on their legs and back.

Case C: For seniors after giving up their license, or if you want to travel with a pet, "LBIRD" is the answer.

LBIRD solves the social problem of "lack of transportation for seniors after surrendering their driver's licenses" in Japan. While it looks like a senior car, it offers the agile performance of a special small motorized bicycle and the convenience of being able to load a shopping basket directly onto it. It's attracting keen attention from seniors who "still want to be active but want to ride with safety first," and from pet owners who want to take their beloved dogs for walks in large parks.

4. No Matter Which Model You Choose, Sun Emperor's Common "Sense of Security" Remains

Even if you're struggling to choose a Sun Emperor model, one thing is certain: "No matter which model you choose, you will gain a sense of security incomparable to cheap, illegal mopeds or 'sold as is' electric kick scooters from overseas."

All vehicles handled by Ryusho Co., Ltd. fully comply with the following standards based on Japan's Road Traffic Act:

• Safety Standard Compliant (Performance Confirmed Sticker Attached): There is no need to fear police enforcement whatsoever.
• Special Designated Small Moped Mode Equipped: With a single button, it switches to sidewalk riding mode (6km/h), and the green maximum speed indicator light flashes.
Full Domestic After-Sales Support: In the event of a malfunction or replacement of consumables (tires, battery), domestic bases will provide careful support.

5. Summary: Choose the Perfect Partner for Your Lifestyle

Each of Sun Emperor's three models has distinct strengths.

• If stamina and maneuverability are your top priorities, the 2-wheel Easy.
• If you want to balance stability and cargo capacity, the 3-wheel SUNRIN.
• For ultimate safety, a new mode of transport for seniors, or traveling with pets, the 4-wheel LBIRD.

By choosing based on your daily commute, travel distance, and "how stable you want to ride," you're sure to make the best, most satisfying purchase. Complete the proper procedures (license plate registration, compulsory insurance), and experience comfortable mobility in a new era with a reliable domestic brand!