I thought that all Japanese phone maker use proprietary OS exclusively to power their phone. I was wrong, as this link shown. The list only show DoCoMo’s FOMA. I believe Softbank has also SymbianOS’s phone. Though, I doubt KDDI’s AU will have any SymbianOS as they really focus on Japan market only.

BTW, which phone do you own?

PS: I got the link from Guardian newspaper

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