I wish I have the means to travel to Japan right now because prices never been cheaper, especially food. Feels like missing out on a great opportunity
You'd probably better off taking a side trip to Korea or Taiwan.
Also, if the trip is of sufficient length, you can totally offset the cost.
When I lived in NYC, I used to travel to the UK a few times a year, and the flights between NYC and London were around $500 round trip. The cost of eating in the UK was typically 1/2 that of NYC, plus cool castles and history.