If you search for "ukulele jazz" on a mainstream sheet music site, you will find simplified charts. If you search for "Kiyoshi Kobayashi," you will find vinyl records of his trio, but rarely the sheet music.
Check Japanese auction sites (like Yahoo Auctions Japan via a proxy service) or specialized jazz bookstores. is the gold standard. Set an alert. It is worth the hunt. ukulele jazz kiyoshi kobayashi pdf
Because the book is published for the Japanese market, it can be expensive and hard to find for Western players. Ukulele Underground Forum Book Review: Ukulele Jazz If you search for "ukulele jazz" on a