I caught this blowfish underneath the WaniKani bridge in the main stream of the Tofu River.
Koichi is known for having a big influence on mainstream fashion.
When you say mainstream Japanese literature, who is the first author that comes to mind?
The origin stream, that's where everything comes from. That is the mainstream.
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well.