I’d like to recommend two bookstores for those who want to purchase books on how to improve their cooking skills.
Japanese cookbooks and English cookbooks are both available in these stores.
There are also magazines and animation style books on cooking.
To the best of my knowledge, as of 2019, there are books available on specific subjects such as Sushi, Ramen, Japanese food, Sake, Tea etc., but books focused on Yakitori, Tonkatsu (deep fried pork cutlets), and Teppanyaki are only available in Japanese.
However, some books have a lot of pictures, and you may be able to learn what you need from the pictures, so be sure to check both the English and Japanese sections of the bookstore.