78-79 Japanese Collector Book - Looking For More Info

Howdy,

I got the below book from my dad recently who picked it up well over a decade ago because he thought it looked cool.

I have been able to determine all the stamps in the book are 1978-1979 sumo themed and have write-ups on the stamps themselves to the left.

Total of 10 stamp/bio combos in the book.

Anyone know more info on this book/what I'm dealing with in terms of the mint stamps?

Any help is much appreciated.

Cheers,
Chris

Here's a couple from ebay, not the same as yours but probably about the same value;

http://www.ebay.com/itm/Japan-Stamp...AOSw4GVYL8sU

http://www.ebay.com/itm/c-1960-Sumo...AOSwv0tVN6DB