I have studied Comic Art in Japan and during that time I met a group of Japanese students who were really into concept art. Together we made an artbook that will be sold at the Comiket in Tokyo this december. Comiket is the biggest manga/art/doujinshi fair in Japan and is held every year. It’s very hard to get a spot there to sell your stuff! I’m very excited and wished I could be there! This is the book:
The title “Toekomst” means Future in Dutch, and I’m flattered they wanted to give the book a Dutch title 
The second drawing is mine, and the bottom one is from Ward. The other artists have Japanese websites:
だん http://www.pixiv.net/member.php?id=27969
土人 http://www.pixiv.net/member.php?id=28337