The Thermal and Near-infrared Sensor for Carbon Observation Fourier Transform Spectrometer (TANSO-FTS) on board the Greenhouse Gases Observing Satellite (GOSAT) simultaneously observes column abundances and profiles of CH 4 in the same field of view, from the shortwave infrared (SWIR) and thermal infrared (TIR) bands, respectively. We compared CH 4 column-averaged dry-air mole fractions (XCH 4 ) derived from the SWIR band, XCH 4 calculated from the TIR CH 4 profiles, and XCH 4 calculated from the CH 4 data obtained over Guam airport by commercial aircraft. The difference between the SWIR-XCH 4 and aircraft XCH 4 values (SWIR − aircraft) was −8 ppbv on average, and the 1σ standard deviation was 10 ppbv. The average difference between the TIR-XCH 4 and aircraft XCH 4 values (TIR − aircraft) was −5 ppbv, and the 1σ standard deviation was 15 ppbv. The ranges of uncertainties in the calculated aircraft XCH 4 values were estimated to be 9, 3, and 2 ppbv, which came from stratospheric CH 4 assumption, tropopause height determination, and meteorological dataset used, respectively. Both the SWIR-and TIR-XCH 4 values agreed within 0.5% of the aircraft XCH 4 values, demonstrating that the GOSAT CH 4 data are both valid and consistent with each other over the tropical ocean.