Even though Japan is surrounded by heavy spicy food eater countries, Japanese food is not spicy at all. So is not that common to find strong chilis or sauces on your everyday supermarket. Even so, I have managed to get my hand on some sauces and ingredients here and there.
You can identify some Thai and Vietnamese sauces, even some Mexican (by far the hardest chili to find are the Mexican family).
Last picture is what I use to make my own powder mix and chili oil.
Two items to recommend: any spicy sauce with Yuzu (japanese citrus, 3rd pic, 4th bottle) and the amazing Shima togarashi (島とうがらし), a small but incredible spicy and delicious chili variant from Okinawa. Hard to get outside the islands, 3rd pic, 3rd bottle chilis on Awamori.
by choolete
