Some items are made from special products from the area, others still are made from ingredients completely irrelevant to the region. Disregarding the “Wa (Japanese-style)” and “Yo (Western-style)”, there are lots of places that sell sweets.
Commitment to “sweetness” can be seen as a measure of the cultural awareness of that country.
Well… at least Japanese people love sweets. They line up for extreme amounts of time outside stores, even making reservations for months down the line. This may be a fun opportunity, so try it out if you find something that looks intriguing. It may be a golden opportunity for your Instagram!