So, today at the TeaTable I brewed up Ippodo's Kumpu Sencha ... brewed the Ippodo way (lots of leaf). Delicious as it looks.
On the Ippodo website are "one-pot" bags of tea which contain 10 grams. They don't specify the pot size, so I'm assuming I can stretch a bag to 2 sessions in a small kyusu. i'm hoping those one-pot bags are for sale in NYC when the store opens so I can sample a variety of their teas. They're just a bus ride away from me, making near-instant gratification a reality.
I think their Sencha will be suited to your tastes and sensitivities!
For Sencha, their site mentions 210 ml (7 ounces) water for the 10 grams. So, I often do 4 or 5 ounces steeps, and I did a proportionate amount of leaf for the Kumpu. This worked fine. I would try to at least stick to the ratio of leaf to water. This ratio is higher than the benchmark 1:1 (grams : ounces) I usually first try a new sencha. Works out to 1.4:1. Still, the brew was smooth. Try this with some sencha and your hair may fall out.
Then elsewhere on their site, they mention you can also brew all 10 grams in a smaller steep of 120 ml ... I have not tried this. This is a much higher ratio of 2.5:1. I imagine this would give you a pretty intense cuppa. O_O Certainly worth trying.
They also mention a slightly higher brew temp of 80* C (176* F) which is a bit higher than I usually go, 170* ish or even lower. But the Kumpu would take this temp without a problem, I think ... but it was also fine at 170*.