Certainly possible, speaking some Japanese would help, lots of easy casual work you could do in the meantime (English teaching, bar/service work, gig economy etc.)
Start points
You could try WeXpats Agent (a recruiter); Japan Dev (great listings!), but this selection come from GaijinPot
Senior PHP Developer
MCJ export
Osaka, ??
?3.0M ~ ?6.0M / Year
https://jobs.gaijinpot.com/index/view/job_id/143240
Game Customer Support Staff (English)
????????????DIGITAL Hearts CO., LTD
Shinjuku, Tokyo
?1,200 / Hour
https://jobs.gaijinpot.com/index/view/job_id/143062
Global Full Stack Developer
PlayNext Lab Inc.
?3.0M ~ ?6.0M / Year
https://jobs.gaijinpot.com/index/view/job_id/143053
Other posts
IT jobs in Japan ???? ?? ???
Game on - jobs in Japan ????!
Tech jobs in Japan ????
Live, work & code in Japan????!
So you are thinking about living and working in Japan!
Cheap hostels to stay in Tokyo, Sapporo and Kyoto
All the Japanese???? influences in crypto
Hit me up in the comments if you have any questions!
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Thumbnail photo by Fabrizio ChiaganoUnsplash