The manual of the PS2 version doesn't mention "Konami Software of Shanghai, Inc.", but the manual of the Xbox version does. Which means the PS2 to Xbox conversion was handled by them.
DIRECTOR
Chen Ping
LEAD PROGRAMMER
Xu Zheying
PROGRAMMER
Xie Mo
Shen Mo
Cao Lei
Yi Wei
DESIGNER
Wei Yuncheng
SOUND PRODUCER
Wu Kaihong
SOUND DESIGNER
Qian Kai
QUALITY MANAGER
Wu Xiaomian
SPECIAL THANKS
Izumida Toshitaka, Hayashi Yoichi, Xiong Jiantang
Gamespot says that Konami announced the opening of the Shanghai office in 2006, which is either Gamespot bullshit or Konami bullshit, since Frogger's Adventures for the GBA was already co-developed by them in 2001.