What is a bait ？
When we find a rise on surface, the great game bigins.
Fortunately, as trout Island, Our Hokkaido and some of other country are similar climate. Especially season of Mayfly, we have many kind of Mayfly in May.
Exemple, Okuma-madara which is drake 12 size, not small, hatch on surface,
makes a trout mud.
Most streams are in flat land, species are trouts not spawning, Browntrout first,
and then Rainbows next.
Mid May to end of June is best time.
I wrote about basics of those fishing on NorthAnglers magazine latest one.
Please check it out, if you can.