[webmascon]

It depends on your employer. International banks are present in all major cities. So English is mainstream. And you do not need to be in Tokyo for that. The most important thing is where your trading computers are. Plus mind that hft and algorithmic trading are not the same things. Hft is proptrading which is now mostly forbidden for large international banks by Volker rule.

[mywrathacademia]

Thanks for mentioning HFT is not the same as algorithmic trading. Actually, I don't mind learning Japanese at all so may be you have some advice on what skills are needed in that part of the world to land a trading job as well as where to look? Also, is it just international banks that hire HFT traders?