You can work in a restaurant, serving Ramen, work in a shop like Yodobashi Camera, but you can also be in a specialist field, building robots, testing them, doing medical sales, programming, ...
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You have to be able to speak in Japanese, understand the Japanese way of work.
You can work for 1100yen/h but you have well paid overtime.
The specialist jobs depends on your experience.
Then send me your resume and tell me about your Visa and your level of Japanese.