Quick answer
JIS K2234 coolant meets the Japanese Industrial Standard for engine antifreezing coolants. The current edition is JIS K 2234:2018. It is a performance standard, not a car maker's approval. 29 products in our data list it.
What to buy
PEAK ORIGINAL EQUIPMENT TECHNOLOGY Antifreeze + Coolant 50/50 Prediluted for Asian Vehicles - BLUE · Premix 50/50 · lists JIS K2234
One of the products whose maker lists this spec code, with a verified Amazon listing. Buy only if your owner's manual names the same code.
Check price on AmazonAll buying optionsAs an Amazon Associate I earn from qualifying purchases. Commissions never change which products we list or what the data says.
Key takeaways
- Japanese standard for engine coolant.
- Current edition: JIS K 2234:2018.
- Covers EG-based coolant at 30–60%.
- Not a car maker's approval.
What the code means
- The Japanese Standards Association lists JIS K 2234:2018, issued 20 Aug 2018 and confirmed 20 Oct 2023. [1]
- GlobalSpec's summary describes it as covering ethylene-glycol-based engine coolants used as aqueous solutions of 30–60% by volume. [2]
- Per GlobalSpec, the 2018 revision dropped the older Class 1 (AF) type and kept only Class 2 long-life coolant (LLC). [2]
JIS K2234 vs a car maker's coolant
Japanese car makers sell their own genuine coolants: Toyota Super Long Life (00272-SLLC2), Honda Type 2 and Nissan Long Life Blue (999MP-L25500P), per their parts sites. A JIS K2234 claim shows a coolant meets the general standard; it does not mean the maker approved it for your car. Compare Toyota, Honda and Nissan.
About to top up with a different coolant?
Check compatibility →Coolants whose maker lists it (29)
Each row is a product whose manufacturer lists this code on its own page or datasheet (data checked 22 Oct 2026). A listed code is the maker's claim; we have not tested the products. Products with a checked Amazon listing come first.
Showing 15 of 29. The rest are in Find my car coolant.
As an Amazon Associate I earn from qualifying purchases. Commissions never change which products we list or what the data says.
Related spec codes
Ford WSS-M97B44-D · GM Dex-Cool (GMW 3420 / GM 6277M) · Mopar MS-12106, MS-90032 & MS-9769 · all coolant specs. Buying for a particular car? See Toyota, Honda, Nissan, Subaru, Ford.
Frequently asked questions
Is JIS K2234 coolant safe for my Toyota?
It meets the Japanese standard, but Toyota sells its own genuine coolant. Use the coolant your manual names.
Is JIS K2234 a colour?
No. It is a performance standard. Products that list it come in several colours.
New to cooling systems? Start with how a car cooling system works. Looking for a product? Search the coolant directory or match your manual's spec with Find my car coolant. See also coolant by car make and coolants by brand.
Ready to buy?
PEAK ORIGINAL EQUIPMENT TECHNOLOGY Antifreeze + Coolant 50/50 Prediluted for Asian Vehicles - BLUE · Premix 50/50 · lists JIS K2234. Check that your owner's manual calls for it.
Check price on AmazonAll buying optionsAs an Amazon Associate I earn from qualifying purchases. Commissions never change which products we list or what the data says.