Japan and Urawa Reds defender Keisuke Tsuboi announced the end of his international career on Friday. "I had been stressed out for not being able to make game appearances (for Japan) and I had to contain my frustration at the conflict of still having to help the national team," Tsuboi said after Urawa's practice in Saitama. He has been left out of the 23-man squad, the Japan Football Association announced Friday for the East Asian Championship from Feb. 17 to 24 in Chongqing, China. Tsuboi began to think about ending his international career after the Asian Cup last summer and informed Japan coach Takeshi Okada in late January of his intention to focus on his J. League club. The 28-year-old Tsuboi has been capped 40 times for Japan, including in the 2006 World Cup in Germany.