Japan always worried about shortage of gasoline in the Pacific War. The table shows the import and the production of gasloine etc. US banned export of high quality aviation gasoline in December 1939 and low quality gasoline (less than 87 octane) in Jul 1940.
Ishii, p72-73
レギュラーガソリンの比重は0.73、プレミアムガソリンで0.77、軽油では 0.83

IJA Tokuyama oil refinery plant suceeded in production of 92 octane aviation gasoline in March 1937. IJA Yokkaichi oil refinery accomplished a crude distillation unit in June 1941. IJA Mancuria oil refinery plant succeeded in production of 92.6 aviation gasoline in September 1944.

Japan occupied Java in 1942. So occupied oil plants of Palembang began export of gasoline to Japan. The export of gasoline increased in 1943. But it decreased again because oil tankers were sunk by US submrines and aircraft in 1944. IJA Iwakuni oil refinery plant began to produce gasoline in 1943. But the plant could not work well because of shortage of imported oil in the end of 1944. The last two oil tanker from the south entered Tokuyama Port on Mar 1945. But 112 B-29s released 500lb bombs of 549t on 10 May 1945. 40% of the bombs hit it and destroyed. IJA had stock of 300kL (1,887bbl) aviation gasoline only in the end of the Pacific War.
Ishii, p216

Domestic sale of oil [ML] Sekiyu-seihin Year Gasoline Jet 1972 24,871 1,516 1973 27,223 1,673 1980 34,543 2,967 1990 44,783 3,739 1996 53,032 4,736 1999 57,251 4,639 2000 58,372 4,611 2001 58,821 4,995 2002 59,830 4,603 2003 60,561 4,502 2004 61,476 4,906 2005 58,421 5,129 2006 60,552 5,453 2007 59,064 5,916 2008 57,473 5,676

Domestic comsumption of Gasoline [kbbl] Ishi, p50-51 Year Auto Aviation 1931 4,099 296 1932 5,456 314 1933 5,613 387 1934 5,573 391 1935 7,534 428 1936 7,241 557 1937 8,874 714 1938 7,836 969 1939 6,105 1,094 1940 7,864 1,287 1941 3,188 2,223 1942 2,642 3,826 1943 2,527 5,190 1944 1,416 4,776 1945 Apr-Sep 577 818