The Japanese book title is 寺田克也ラクガキング, by 寺田 克也 (Katsuya Terada).

Katsuya Terada is probably best known in the United States as the character-designer for the animated film Blood: The Last Vampire. He has also done work related to American comics, such as Iron Man and Hellboy (one of his illustrations was used for an official statuette of Hellboy).

This 1000-page sketchbook contains a selection of sketches drawn over a period of 20 years prior to 2001. These are mainly character sketches created with pencil and ink. I'll let the pictures do the rest of the talking.

Here are direct links to the book:
Amazon.com | Amazon Japan |YesAsia USA

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Here are direct links to the book:
Amazon.com | Amazon Japan |YesAsia USA

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Here's the Amazon Japan buying guide for your reference.