I had posted but now it disappeared, maybe I accidentally deleted it when editing? Sorry about that.
I wrote a guide for all Japanese tea types here (still under development but mostly done) http://www.myjapanesegreentea.com/types-of-japanese-green-tea
Although Japanese teas are mostly green, the temperatures and brewing times vary considerably.
I suggest a kyusu but not much hardware is needed, except maybe for matcha.Plus, the guidelines aren’t set in stone, start with the basics and then you’ll end up with what works best for you.