Diplomatic wrangles in Pacific over rights to reserves

Until recently, few had heard of Zhan Qixiong or his battered fishing boat. However, after the fisherman and his 14-strong crew were taken into custody by the Japan Coast Guard in September, he found himself at the centre of an escalating geopolitical row that quickly put planned discussions over gas and oil deposits between Beijing and Tokyo on hold, and ratcheted up broader tensions in the region. Julian Ryall report from Tokyo.