Not a brand list. A chip question.

GrapheneOS on a Pixel can usually install a Japan travel eSIM if Settings shows an EID (*#06#). That is the cellular profile (Airalo SoftBank +1, Holafly KDDI/SoftBank, Ubigi Docomo — prices I copied 2026-08-29, re-check checkout).

It will not add Welcome Suica Mobile. Suica tap is FeliCa. Most overseas Pixels never got that hardware. GrapheneOS cannot invent a missing radio. Plastic IC for gates.

If someone here has a Pixel on Graphene that did add Suica in Japan, that is the useful correction. I have not seen a first-party claim that it works.

Dated notes: https://before-you-land.tiiny.site/japan/android/

Disclosure: Airalo links there may earn a commission. Holafly/Ubigi are official/untracked.