Glass is a reliable standard for any tea- good because it doesn't retain any flavorings, so you can use the same vessel for China Green, Japanese Green, Black Tea, etc, w/ no cross contamination. French Press carafe's work well.
But for Japanese I use the stuff below, the tokoname teapot and water cooler, and the bizen teacups are made from clay specially chosen to enhance the flavor of Sencha.
As for Japanese Tea recommendations, my favorite is the Chiran region in Kagoshima prefecture in the Southern island of Kyushu. The rich volcanic soil produces an equally rich vegetal tea:https://www.itoen.com/loose-leaf-tea/ja ... idori.html
You can't go wrong ordering from Ito En (above).
Ippodo is another top vendor, they as well as Ito En supply the famous Japanese tea schools, and their Kyoto store is one of the oldest continually running businesses in the world, dating back several centuries.http://shop.ippodo-tea.co.jp/kyoto/shopf/index.html
Downside is you have to pay international shipping, whereas Ito En ships to USA from their Brooklyn warehouse.