Thank you for the advice. I was going to go with these noodles at first, but I will change that now. One of the biggest issues for me is whether or not to use miso. If so, which one to use? Here in Germany is very often distinguished exclusively between light and dark miso. Do you have any advice?
I use bidet but it's not necessary for me so it won't bother me too much when there's none of them. Some doesn't use bidet outside their home even while they're in Japan, because the idea of using bidet of public restroom grosses them out. And there still are homes out there that doesn't have bidet functions to begin with. (It's not a hard standard for housings - it's only been a few decades since it was introduced to the market.) So I think it's fair to say that the bidet function is more or less still good-to-have extra option for the most of us. Some damps TP in water but that's impossible when the toilet doesn't have water faucet function like many Japanese toilet, so in that case, they just go for classical method.
Other commenter gave you link to the product but TOTO also makes the "portable washlet" thingy as well. I don't know anyone who used it but I suppose it gets the job done.
Ah damn, that's basically the exact opposite side of the state ahahah its the main city I've been wanting to visit for a while though, seemed all my friends at uni were from there. Goodluck!
Btw, to answer your question, I can't speak for the Japanese but I've heard people getting travel bidets (https://www.amazon.com/2PCS-Pack-Handheld-Personal-Bidet-Easy/dp/B078TVK1G1/ref=sr_1_6?keywords=travel%2Bbidet&qid=1658613358&sr=8-6&th=1) and / or wet wipes, if that can suffice temporarily
Before the spread of plastic, Japanese people have used utensils made of wood, bamboo, iron, and so on.
It is true that Japanese recently use a lot of plastic, but even now, many people prefer using tools other than plastic because they last a long time and fit comfortably in the hand.
I found a bilingual book that introduces Japanese traditional kitchen tools, and here is the link.
>also, not many places knew how to process green tea, like the whole ritual way of brewing it correctly.
You don't have to be that authentic to enjoy your green tea. Why don't you just use tea bags?
https://www.amazon.co.jp/dp/B004M89V6K/
This one is not my favorite, but it still tastes very good, and it's available all over Japan. I don't know if they will ship it out of Japan or not, though.
伊豆の踊り子(The Izu Dancer) by 川端康成(Yasunari Kawabata) is my favorite love-story. Also, the writer has the first Nobel prize of literature in Japan.
https://www.amazon.com/Izu-Dancer-Other-Stories/dp/0804811415