Indonesian players book six Japan Open tickets. Simon Santoso will compete against senior Taufik Hidayat in the semi-final after defeating countryman Sony Dwi Kuncoro 21-16 and 21-17. The other men's singles semi-finalists are China's unseeded Bao Chunlai facing Vietnamese eight seed Nguyen Thien Minh.
Bao Chunlai overcame third-seeded Peter Gade 21-17 and 21-14 while Nguyen Thien Minh won a 21-14, 21-16 victory over Kazuteru Kozai, the only Japanese men's singles quarter-finalist.
In the men's doubles, Indonesia put 3 pairs in the semi-final as Markis Kido/Hendra Setiawan, Rian Sukmawan/Yonathan Dasuki, and Alvent Yulianto/Hendra Aprida Gunawan progressed.
World number one Markis/Hendra Setiawan easily conquered Korean Hwang Ji-man/Shin Baek-cheol 21-13, 21-19; Rian/Yonathan struggled hard to win over Malaysia's Zakry Abdul Latif/Fairuzizuan Tazari 25-23, 16-21, 21-10; Alvent/Hendra Gunawan took a 21-19, 12-21, 21-16 victory over fourth-seeded Mathias Boe/Carsten Mogensen of Denmark.
The other semi-finalist contenders are Howard Bach/Tony Gunawan of the United States. However even Tony is an Indonesian player, playing for the US. They will meet Rian/Yonathan in the semi-final.
In the women's doubles, Indonesian Greysia Polii/Nitya Krishinda moves to the semi-final after beating Japan's Kayako Konishi/Sayaka Takahashi 21-10, 21-17. But their success isn't followeed by another Indonesian pair, Shendy Puspa Irawati/Meiliana Jauhari.
Shendy/Meiliana were defeated by seventh seeds Miyuki Maeda/Satoko Suetsuna in straight sets, 19-21 and 10-21.
In mixed doubles event, there are two Indonesian pairs who will play in the semi-final. 2005 & 2007 world champion Nova Widhianto/Lilyana Natsir won over Korean Ko Sung-hyun/Ha Jung-eun 17-21, 21-7, 21-14 to meet six-seeded Joachim Fischer Nielsen/Christinna Pedersen who beat Indonesia's Devin Lahardi/Lita Nurlita 21-18 21-12.
Hendra Aprida Gunawan/Vita Marissa conquered Thomas Laybourn/Kamilla Rytter Juhl of Denmark 21-18 21-17 to set a semi-final clash with Thai Songpol Anukritayawan/Kuchala Worawichitchaikul.
The only semi-final that doesn't have Indonesian contenders is women's singles. Chinese Wang Yihan will compete against local favorite Eriko Hirose and another Chinese player, Wang Lin, will take on compatriot Wang Xin.