The signs are in Traditional Chinese, specifically mentioning "池上木片便當" (Chishang Bento), which is a very common bento chain in Taiwan. The presence of numerous scooters parked in the arcade is a classic feature of Taiwanese urban streetscapes. The text on the blue sign in the background mentions "台北" (Taipei), confirming the city. I am very confident this is in Taipei, Taiwan.

then: guess