YS - 11 service to Tokyo began in 1979 .
YS - 11 service to Tokyo was upgraded to DC - 9 jet service in 1980 and A300 widebody service in 1993 .
YS - 11 service to Tokyo began in 1979 , and was upgraded to DC - 9 jet service in 1980 and A300 widebody service in 1993 .