Overview
The PROFREAK V2 KURENAI — Adjustable rubber thumbstick caps for PS5, Switch Pro is a thumbstick cap for PS4, PS5 and Nintendo Switch Pro controllers. Caps like this fit over an analog stick to make it taller, and players often call them 'freeks'.
The short version: it suits players who find the stock stick too short but found typical tall caps too extreme. Its value is that you can fine-tune the height across a range of a little over 2mm.
It is not for players who want a much taller stick, or who play on an Xbox controller.
Measured from the base, the height adjusts steplessly from 5.3mm to 7.6mm.
The adjustment mechanism is patented (Japanese Patent No. 6797507).
Everything from mold making to manufacturing and packaging happens at a factory in Yamagata Prefecture, Japan. The cap keeps the same diameter as the stock stick.
On Amazon.co.jp it is rated 4.2 out of 5 stars from 2,962 reviews (as of June 2026), which shows solid support in both review count and rating.
What Thumbstick Caps Do, and What Sets This One Apart
A taller stick means your thumb must travel farther to tilt it by the same angle. That makes small aim corrections easier.
The trade-off is more thumb travel for fast, wide turns. In other words, a thumbstick cap trades speed for precision.
The right balance depends on your hand size, your sensitivity settings and the games you play.
Most caps come at a fixed height, such as low, mid or high. If one does not suit you, the only fix is to buy another, so finding the spot between 'mid is too low' and 'high is tiring' is hard.
This cap can be set anywhere between 5.3mm and 7.6mm, so you can find that in-between height yourself.
Because the diameter matches the stock stick, it also avoids a common problem with wide caps: the top edge bumping nearby buttons or the base of your thumb.
| Aspect | Fixed-height caps | PROFREAK V2 KURENAI |
|---|---|---|
| Height | Set by the product | Stepless, 5.3mm-7.6mm |
| If it doesn't suit you | Buy a different height | Readjust the same cap |
| Diameter | Varies (some are wide) | Same as the stock stick |
| Top shape | Varies | Convex (KURENAI) |
Fixed-height caps are mechanically simpler because they have no adjuster. Neither type is simply better.
The real question is whether you already know your ideal height. If you don't, an adjustable cap is a good way to find it.
Compatibility Guide
The maker lists four supported controller types: PS4 controllers, PS5 controllers, the Nintendo Switch Pro Controller and BRITZ2-compatible controllers. Xbox controllers and standard USB gamepads are stated as not supported.
Stick shafts and tops differ between brands, so a cap that doesn't match may not stay on, or may come off during play.
Common pitfalls:
- Joy-Con are a different product. Among Switch controllers, only the Switch Pro Controller is listed. Joy-Con sticks are smaller, and Joy-Con are not on the list.
- Check PlayStation variants and third-party pads. The DualSense Edge and third-party PlayStation-compatible controllers are not listed by name. Their sticks may not match the stock shape, so check the product page before buying.
- Newer controllers that are not listed should be treated as unsupported.
- Installation: the cap simply fits over the existing stick. You need no tools, no adhesive and no disassembly.
Product Info
| Item | Details |
|---|---|
| Compatible devices | PS4, PS5, Nintendo Switch Pro Controller, BRITZ2-compatible controllers |
| Material | Rubber, resin |
| Color / shape | KURENAI (convex) |
| Height range | 5.3mm-7.6mm (stepless) |
| Adjustment range (as listed) | 2mm |
| Quantity (as listed) | 1 |
| Patent | Japanese Patent No. 6797507 |
| Country of origin | Japan (Yamagata) |
The Amazon.co.jp price was ¥2,752 as of August 2026 (the same as in June 2026).
Prices change with sales and stock, so check the product page for the current price. Warranty follows the manufacturer's terms.
Only the cap is included, with no special tools or extra parts.
The cap combines rubber and resin, and the rubber gives your thumb grip. Its main differences from competing caps are that it changes only the height while keeping the stock diameter, and that it is made entirely at one factory in Japan.
Setup and Tuning Tips
We don't recommend starting at the maximum 7.6mm.
Play for a few days near the minimum 5.3mm, then raise it gradually if needed.
A cap changes how sensitive the stick feels even when in-game sensitivity stays the same. So whenever you change the height, adjust the in-game sensitivity slightly as well.
In shooters, many players put a cap only on the right (aim) stick, or use different heights on each side. Movement on the left stick often depends more on quick input than on precision.
Stepless adjustment gives you freedom, but a setting that shifts can be hard to get back. Once you find a height you like, measure it with a ruler and note it down.
Who It's For
- Controller FPS/TPS players: a taller stick gives your thumb more room, which makes small aim corrections easier. It suits players who struggle to settle their aim on distant targets. Raise the height gradually, because a big jump takes time to get used to.
- Players with large or small hands: the stepless range lets you match the height to your hand, whether the stock stick feels cramped or tall caps felt awkward.
- First-time cap users: because the diameter matches the stock stick, the change feels mild, which makes it a good starter cap.
- Players still looking for their ideal height: one adjustable cap is less wasteful than buying several fixed heights to compare.
- Players who care about build quality or origin: it is made entirely at one factory in Yamagata, Japan.
Before You Buy
It only fits the four listed controller types. Xbox controllers, standard USB gamepads and Joy-Con are not supported, so make sure your controller is on the list.
The height range is just over 2mm. 5.3mm to 7.6mm is plenty for fine-tuning.
It is not enough if you want a much taller stick for maximum precision, and a fixed tall cap will probably satisfy you more. Note that the range works out to 2.3mm, while the listing says '2mm'.
Both are listing figures, so the small difference is most likely just how it was written.
Check how many caps are included. The Japanese title says 'set', but the listing gives the quantity as 1.
If you want caps for both sticks, check the images and description on the product page before ordering.
The rubber wears down. After long sessions, the thumb surface can wear or get slippery.
Treat the cap as a consumable you will eventually replace.
Caps do not fix stick drift. Drift comes from inside the stick, and a cap does not change that.
The convex top isn't for everyone. KURENAI has a domed top.
If you like a concave, cupped top that wraps around your thumb, this shape may not suit you.
FAQ
Q. Does it work with Joy-Con or Switch 2 controllers? A.
For Switch, only the Switch Pro Controller is listed. Joy-Con and other controllers that are not listed are not guaranteed to work.
Q. What height should I start with? A.
Start near 5.3mm and raise it a little every few days.
Adjust your in-game sensitivity along with it.
Q. Should I use it on both sticks? A.
Many players cap only the right stick. For both sticks, check the included quantity on the product page.
Q. Will it fix stick drift?
A. No. A cap only changes height and grip, and it does not touch the internal parts.
Q. Do I need tools to install it?
A. No. It fits over the existing stick with no adhesive and no disassembly.
Product Disclosure (Amazon)
- Manufacturer: プロフリーク
- Seller: Amazon.co.jp
- Fulfilled by: Amazon.co.jp
- ASIN: B0H38X45MG
- Note: This article covers a manufacturer-made product based on Amazon listing details.
