Or, according to Kashitaro, "My Thin Way".
The song is based on a very famous poetic travel diary written in the Edo Period by a Japanese poet, Matsuo Basho, as he traveled through Japan on foot. The original text is titled "Oku no Hosomichi, or "Narrow Road to the Interior". Many lines of this song make reference to famous lines from this text. I don't think you guys particularly need or want a history/Japanese Literature lesson, so I'll stop there, but you can always google it for more info or send me a message on tumblr.
Lyrics: Ito Kashitaro (伊東歌詞太郎)
Composition: MikitoP (みきとP)
Illustration: Yuroi (川野)
Video: Otori (大鳥)
Engineering: TomoboP (友達募集P)
Original Video:
NND: http://www.nicovideo.jp/watch/sm25943231
YT: • みきとP『 ぼくのほそ道 』MV
*I do not own anything in this video. All rights go to the original NND uploader, MikitoP.