I have had this teapot for sometime now a few years, I can not find the mark in my books, Peter can to read the mark, I would say this is from the 20's or 30's of the 20th century Possibly related to Kutani. I am posting this because Kaaren posted a cup and saucer of the thousand faces in which the mark is illegible, I am hoping that the reading of the mark on this teapot will help identify the mark on kaaren's as well, I was glad that I found this teapot because it is complete most are missing the porcelain strainer.
Here are more photo's to view.
The mark is:
Takazaka (made), this can also be read as Takasaka, depending on the place and person.
The Japanese internet says Meiji period Yokohama-yaki,