At 413 pages long, Coins of Japan contains a wealth of information about prehistoric to early Meiji Japanese coinage. This book is the predecessor to the Hartill catalog. Although this book provides no price guide or numbering system, it is still a recommended read for any Japanese coin collector. Copyright on this work has expired, and it is in the public domain. Available as a PDF for free or on Amazon (reprints of the original)
Guide for identification of cash coin Kanei Tsuho with the character EI inclined to the left
This is a very useful guide on how to distinguish the five mints that produced Kanei Tsuho 1 Mon coins with a closed-head Tsu character and drooping Ei character. The link is found on zeno.ru.
Early Japanese Coins
The current guide to Japanese Pre-Meiji coinage. This book has a numbering system and rarity guide. Available on Amazon
Jacobs, Norman and Vermeule, Cornelius C.
Japanese Coinage: A Monetary History of Japan by
Another perspective on both cast and struck Japanese coinage. Available on Amazon
Craig, William D.
Coins of the World, 1750-1850
This catalog is commonly used to identify bar coins. Available on Amazon
Standard Catalog of World Coins 1801-1900, 1901-2000 and 2000-date
These ubiquitous catalogs are essential to any collector of struck Japanese coins, because almost all Japanese coins for sale in the US are identified to it. Available on Amazon
JNDA Catalog of Japanese Coins
While this catalog is in Japanese, it still provides a guide to varieties of both cast and struck Japanese coinage. Available on Amazon or eBay