Flights from east of Russian to Japan resumed for the first time since last year's devastating earthquake and tsunami which led to the Fukushima Daiichi nuclear disaster.
Last month there was a re-start of flights between Khabarovsk and Tokyo.
In addition, Yakutia Airlines has resumed charter flights with a Boeing 737-700 from Irkutsk to Narita International Airport in Tokyo.
The first left on July 14, others will follow on July 21, 28 and August 1.
Irkutsk airport spokesman Ashot Karakhanyan said: 'There has to be better air connections between the regions of the Asia Pacific region.
'This flight to Japan is one of the steps which would develop better business and cultural relations, and increase the number of passengers on this route.'
The new services follow Siberian carrier S7 Airlines which in March this year started regular Airbus A320 flights from both Vladivostok and Khabarovsk to Narita Airport.
Japan and Russia agreed last year to expand landing slots for Russian carriers at Narita airport.