The improving momentum of China-Japan ties is still comparatively fragile, Vice-President Li Yuanchao told a group of visiting senior Japanese politicians on Thursday.

Li noted that the ties have improved in the past year.

"Japan is hoped to meet China at the halfway point to properly tackle the relevant sensitive issues. We both need to make tangible efforts in improving the two-way ties," Li said.

The group of Japanese politicians visiting Beijing was led by Masahiko Koumura, vice-president of Japan's ruling Liberal Democratic Party and a frequent guest to China.

Li said the relationship had been off the track for a period of time in the past few years, and the lessons are profound.

"China is ready to boost the steady and healthy development of the two-way ties in the spirit of taking the history as a lessons and looking to the future. We are ready to accommodate the basis of the four key political documents between the two countries," Li said.

Koumura said the exchanges in various fields are hoped to be strengthened between the two countries, the feelings of the two peoples about each other to be improved, and the Japan-China friendly cooperation to be alive and well.