2012 Keio Challenger
Date	12–18 November
Edition	8th
Surface	Hard
Location	Yokohama, Japan
Champions
Singles
Matteo Viola
Doubles
Prakash Amritraj / Philipp Oswald
← 2009 · Keio Challenger · 2013 →

The 2012 Keio Challenger was a professional tennis tournament played on hard courts. It was the eighth edition of the tournament which was part of the 2012 ATP Challenger Tour. It took place in Yokohama, Japan between 12 and 18 November 2012.

Country	Player	Rank1	Seed
JPN	Tatsuma Ito	65	1
USA	Rajeev Ram	112	2
JPN	Yūichi Sugita	121	3
ITA	Matteo Viola	149	4
JPN	Hiroki Moriya	186	5
TPE	Chen Ti	202	6
GBR	Jamie Baker	237	7
AUS	Brydan Klein	244	8

• ¹ Rankings are as of November 5, 2012.

The following players received wildcards into the singles main draw:

• Toshihide Matsui
• Yoshihito Nishioka
• Masato Shiga
• Kaichi Uchida

The following players received entry from the qualifying draw:

• Yuichi Ito
• Yuuya Kibi
• Shuichi Sekiguchi
• Michael Venus

• Matteo Viola def. Mirza Bašić, 7–6^(7–3), 6–3

• Prakash Amritraj / Philipp Oswald def. Sanchai Ratiwatana / Sonchat Ratiwatana, 6–3, 6–4

• [http Official Website]