Field Guides for Japan
"Nihonno Ikimono no Zukan" or “Animals and Plants of Japan” (alternative title). Child-friendly and a great favorite in the home. Organized according to various habitats: Town /Mountains / Woodland or Forest / Ponds and Rivers. It covers animals, birds, fish and plants. Detailed descriptions are in hiragana but animal, bird and flower species have names in both English and Japanese languages.
"Field Guide to the Birds of East Asia" by Mark Brazil (2008) / "A Birdwatcher's Guide to Japan" by Mark Brazil...is OOP (out of print) but you can buy a copy from Brazil's website. Organized like a tour guide, you can pick your bird sanctuary location in various parts of Japan Brazil gives you a full description of what you'll see, and how to get there. Not a systematic field guide for bird identification really, and no pictures. But the info is useful for birding field trips around Japan. Available from Kinokuniya bookstore.
Mark Brazil is considered one of Japan's leading naturalists, especially for his authoritative birding guide although he writes on a wide range of subjects.You can easily find archives of several year's worth of environment/nature articles by visiting the Japan Times website. Then, under "advanced search"
type “Wild Watch” and that should take you to this URL, thereupon you can find Mark Brazil's articles dating back to 2002. In the same search, you can also look for Linda Inoki’s and Rowan Hooper’s archived articles. Linda Inoki writes about flowers and wildflowers in season in Japan while Rowan Hooper writes about animals of Japan in his Animal Tracker column.