Have no idea about gifts for a teacher. The book, which I am reading as preparation to japanese test,
contains several dialogues, where students are discussing gift to a teacher, they choosed a tea-coffee cup
several times, and some sport gear once.
For my short stay in Japan I received gift of spectacularily well packed pack of soba three
times from three different people in three different places. The last one is still on the table
in my bedroom with business card from some realter, it contains handwrited instruction on english how to
cook soba
One my friend, who is living in states, very happy to receive any food from japan:
sweets, cookies, tea, etc. Once we gave him dried squid, he was so happy. BTW,
giving that dried squid was bad idea. He did read instruction and placed it into microwave
for 20 seconds, beleive me it is heavy mass destruction weaponery, I thought that it is my last day.
For my friends I brought tea, candies and kokeshi dolls.