Kabuto Kamui -5 Impressions] All-around evolution, especially the ventilation and sun visor are superb!

The popular Kamui-3 model with a built-in visor from Kabuto has undergone a full change to the Kamui-5. It has a larger eye port, a larger built-in visor, and additional ventilation. Ventilation performance has been greatly improved. How is it performing?

Thoroughly redesigned from the cap to the ducts and interior

Kabuto's KAMUI-5 was released in mid-December 2025. The previous Kamui 3 was released in 2019, so this is the first new model in about six years. Like the previous Kamui series, it is positioned as a standard model that pursues comfort and features a built-in visor and one-touch buckles. In addition, the Kamui 5 has undergone a major overhaul, from the cap to the interior. The ventilation system in particular was a key point, and its placement and shape were changed. It has a two-tiered upper and lower duct at the mouth, an intake duct at the center of the head, and an exhaust duct at the top of the head. These changes were made to optimize ventilation performance through CFD (Computational Fluid Dynamics) analysis, and cooling performance was verified through wind tunnel testing. In addition, the eye port (helmet opening) has been widened, and the shield features a newly designed biaxial shield ratchet structure and locking mechanism. The sun visor has also been enlarged and can be adjusted to two positions. The interior has also been modified to provide a deeper fit. The design of the cap and head ducts have some traces of the previous model, but the impression is that it has become considerably more massive. The design has been completely changed down to the very last detail.

The KAMUI-5 (Kabuto) is a full face with a built-in visor and other features for comfort. The cap is made of thermoplastic and is divided into two shells (XS, S, M and L, XL) for a fine fitting. The photo shows it with the optional pin lock seat (¥3,300).

The cap looks larger than its compact predecessor, but with an enlarged eye port. Note that the sun visor has been lengthened to overlap the nose guard.

It also looks longer than the Camry-3 in the front and rear directions. It is expected to improve straight line stability. The biaxial shielded base is also new.

The rear exhaust duct is permanently open. The rear wake stabilizer has been reshaped from the previous model and has a more refined design.

The protrusion on the rear side is the wake stabilizer. It is a patented system from Kabuto that stabilizes the cap by suppressing turbulence.

The previous model had intake ducts on either side of the top of the forehead, but a new, wider duct has been added in the center, which can be opened and closed in two stages.

The side ducts are designed to exit back and forth and direct airflow to the duct at the top of the head.

New exhaust ducts are installed on either side of the top of the head. They can be opened and closed with a slide, and together with the rear ducts, draw hot air out of the cap.

The mouth is adjustable in two stages, with two rows of upper and lower intake holes. In the fully open position, running air is introduced to the mouth and shield. In the half-open position, air is introduced only to the shield.

The thin, bluish shield is a "UV & IR cut shield" made of Teijin's polycarbonate, which blocks UV (ultraviolet rays) and IR (infrared rays). This equipment was also used in the previous model, and suppresses temperature increases due to heat from the sun while maintaining clear visibility.

New designed dual-axis shield ratchet structure and locking mechanism. It improves adhesion and quietness while reducing shield distortion. The sun visor can be opened and closed with a lever. The height of the sun visor can be adjusted by turning the screw in the upper right corner with a coin.

The buckle is a micro ratchet type. It is a double-action type unique to Kabuto that allows for secure operation and fine adjustment with multiple interlocking pawls.

The bottom section is newly decorated with red accents. The new bottom is slightly smaller than the previous model, which was softer and more voluminous, but still has the same soft, cheek-hugging design.

A thick, large removable chin cover is included and fastens with three snap buttons for secure fastening.

The fit is natural, and the two-stage duct at the mouth is exceptionally cool.

The actual Kamui-3 in hand looks much more refined, although it still has a few traces of its predecessor. The quality of each part, including the carbon-like processing and grains, is also excellent. When I put it on, I found that the interior bottom is soft and the head can easily fit into it. The headband holds the entire head properly and feels very natural. It is neither loose nor tight, but holds the head exquisitely including the rear part, especially under the cheeks (I am between 59-60cm and 61-62cm for Alai and a L for Shoei). This is probably a benefit of the new interior shape, thickness, and cushion structure. The weight is 1783g (size L, 1796g including chin guard). Although it feels a little heavy when shaking the head, it is an average weight for a full-face with a built-in visor. The Camry-3 was lighter at 1625g as measured by the author, but the weight was probably increased due to the change of the cap body and the addition of ventilation. I was immediately surprised by the ventilation performance of the mouth when I started the ride. I had a chin cover on, but with the ducts fully open, I thought, "Did I forget to wear my chin guard?" The wind blew directly and intensely under my nose. This effect could be felt from about 30km/h. When the duct is in the middle position (only one level open), airflow is introduced to the shield side, but even with that, I felt that the airflow was as good as that of ordinary helmets. The ventilation effect from the forehead up was initially unknown, but when the speed was increased to about 60 km/h, the hot air inside the cap was cleared away. The ventilation performance is very high, as stated in the Kabuto release, "The ventilation system provides unprecedented ventilation and a cool feeling.

Inside the cap, there are a total of four large ventilation holes in the front and back. There are also ducts on both sides of the front of the parietal.

The cheek pad shape is designed to accommodate glasses and sunglasses. The area where the crane fits is thinner, so glasses can be put on and taken off smoothly and without pressure while wearing.

The built-in sun visor with almost no difference between light and dark is excellent.

With the thick chin cover in place, there is no wind entrapment from under the chin. It shuts out some of the ambient noise, so it is basically the quietest part of the car while driving. When driving at 100 km/h with the ducts fully open, a little high-pitched wind noise was generated due to the tilt of the head, but when the ducts were closed, the wind noise changed to a low level that was not bothersome. Incidentally, if the chin cover is removed, the quietness goes down, but the face is very cool with wind coming in from under the chin. And the built-in sun visor is very good. Although there is a little space on the sides, there is almost no space in the center around the nose. In most models, when the driver looks down to check the meter, the gap creates a difference between brightness and darkness, making it difficult to see the meter. This model has very little difference in brightness and visibility. The visor is a direct-acting type that does not use a spring, so it requires a little force to operate the open/close lever, but it is easy to operate. The visor is locked in the up position and will not drop unexpectedly while driving. The UV and IR cut shields continue to provide heat protection from the sun. Combined with the built-in sun visor and effective ventilation performance, we can expect great comfort in the summer. Another beauty is that the switches for each part can be operated lightly. The one-touch buckles are also convenient, and combined with the interior that is easy to put on and take off, it will be useful for city riding, which requires a lot of putting on and taking off.

The built-in sun visor can be adjusted to two levels. In the default lowered position (left), the visor covers the bottom of the nose guard. In the raised position (right), the visor is raised approximately 8mm. This still covers the eyes well.

The entire interior, including the chinstrap cover, is removable. The outer fabric features DEOFACTOR's "antimicrobial treatment" that inhibits the growth of bacteria on fibers. In addition, COOLMAX fabric, which is smooth to the touch, is used in some areas.

When the ear pads are removed, a speaker hole appears. There are also slots for cords and intercoms.

[summary] More comfortable than the previous Kamui-3, with excellent cosmetic performance.

Kabuto's latest Kamui-5 has been improved in all aspects of comfort, such as wearing comfort, ventilation, and visibility. It is a model that can be used for a wide range of activities from city riding to touring. The previous model was lightweight and compact with a built-in visor, but the Kamui-5 is a more comfortable model. While the previous model was priced at 41,800 yen for a single color, the Kamui-5 is a great value for money, costing only 2,200 yen more for a significant evolution. SHOEI's GT-Air3 (from 70,400 yen) is the most popular full-face with a built-in visor, but those looking for something in this category should definitely consider the Kamui-5 as an option.

Image Gallery (19)

Kabuto Kamui -5 Impressions] All-around evolution, especially the ventilation and sun visor are superb!

2025.12.25

The popular Kamui-3 model with a built-in visor from Kabuto has undergone a full change to the Kamui-5. It has a larger eye port, a larger built-in vi...