TOKYO, Nov 22 — Shiina Ito has had fewer Chinese customers at her Tokyo jewellery shop since Beijing issued a travel warning in the wake of a diplomatic spat, but she said she was not concerned.

A souring of Beijing-Tokyo relations this month, following remarks by Japanese Prime Minister Sanae Takaichi about Taiwan, has fuelled concerns about the impact on the ritzy boutiques, noodle joints and hotels where holidaymakers spend their cash.