How close were Royal Navy and Japanese Navy relations?

What were Royal Navy relations with the Japanese Navy after Britain declined to renew the alliance?

They were still workable and often cooperative in the early 1920s, though the relationship worsened as the decade progressed.

The end of the formal alliance did not immediately erase practical cooperation. HMS Hawkins collected doctors and supplies at Shanghai before assisting Japan after the 1923 Great Kanto earthquake. Relief work provided a concrete setting for British and Japanese naval contact. This early-1920s example cautions against reading the later rupture backward. The relationship was still workable at this point, though the political shift in Japan had begun.