Earlier in the day, the Russian and Japanese foreign ministers, Sergey Lavrov and Fumio Kishida respectively, held talks in Moscow. The sides discussed the Syrian conflict, among other issues.
"We are very concerned with the humanitarian situation in this region, I think that we all know that there is a need for a political solution, for the normalization of the situation in Syria… We would like to see Russia continuing to play a constructive role in this regard," Ohtaka told reporters.
He said that the Japanese side acknowledged the importance of Russia's role in the Syrian crisis settlement.
The coalition has been conducting airstrikes on terrorists' positions in Syria without either UN Security Council approval, or Damascus' consent. In turn, Russia is behind a separate aerial campaign in Syria, which was started in September 2015 following a request from Assad.