Found this title while on Amazon Japan. Title please.
 

When I was looking up 土佐闘犬 (this means Tosa Inu, a Mastiff breed that is the largest Japanese dog breed) on Amazon Japan.

http://www.amazon.co.jp/%E6%81%8B%E3...97%98%E7%8A%AC

From the series site of koieko.com, it looks like it's a manga/light novel about the medical field (maybe a guide of sorts)/

I say this because of the following: On the 3 left tabs, the top shows pictures of who I am is the author/medical consultant and 1 of them is him wearing doctor's clothes. The middle tab is a "Contact Me" feature and might be about describing because the site's turquoise tab is a downloadable PDF sampler.

Title please.

恋する心エコー ―心機能は4つの線で理解できる―

a medical reference book.

Japan, you never cease to amaze me.