I was told by an agent, conversion of my Japan DL to Thai is 4,400THB, only eye test. It does require my DL to be translated to English, my yellow book, my O visa, my International DL. Their staff would take me through, eye and reflex test. They said 2 hours from zero to end. I'll go through that 2nd week of July 2025. while in BKK.
It took me 4 hours, not because Thais were slow, Thai Immigration requested me, additionally, to attach my airline ticket (not saying both ways). I could not as my attempts to buy a ticket to BKK were rejected payments.
My bank fixed it. They are now looking into my "O" application. The point is, whoever is going that way, leave aside a day, at least half a day for that effort.
Thank you, so I thought. I may stay 2 weeks or first month) then come back to Thai while my initial 3 months visa (with one re entry and possible extension if needed) is still valid.
I have to use Japanese bank statement to get 90 days stay visa with which I can open a bank account with a Thai bank. Then, once I have that account, move 800K THB into it, leave the funds to season 2 months and then apply for O visa.