So, from what I've seen, there's not much reason why the Japanese couldn't have exploited the oil reserves at Lioahe if they'd managed to discover them, and even going with a more conservative and pessimistic (/optimistic, depending on which horse you're backing) estimate of developing the oil field to start meeting Imperial Japan's requirements over the course of the next 1-4 years, with a discovery date prior to 1935, that'd still be enough to do it by 1939. What would change as a result? For instance, how much would Japanese foreign, governmental and industrial policy change as a result of all that oil? It seems likely that a Japanese Joint Stock Oil Company would be newly established and created to produce oil in the region, in much the same manner as the Kita Karafuta Seki Kabusiki Kayasya (the Joint Stock Oil Company of Northern Sakhalin (JSOCNS)) had been back in 1927. The list of the JSOCNS's shareholders featured major Japanese companies like Mitsui, Mitsubishi, Sumitomo, Okura Kochyo, Nihon Sekyo, and Kuhara; but its first director was the retired Admiral Nakasato, representing the interests of the IJN. Would these same companies hold shares in the new JSOCBG (Joint Stock Oil Company of the Bohai Gulf)? Or would it instead be members of those shinko zaibatsu corporations which arose as a result of Japanese industrial expansion in Manchukuo (such as Nissan)? How would be its director- would it be a member of the IJN, or a member of the IJA instead? And just how much power and influence would this company, and the Zaibatsu conglomerates involved, be able to wield, both in Japan and further afield, as a result of all that oil wealth? One has to wonder- even if Imperial Japan might be more resistant to authoritarian military dictatorships ITTL, due to great wealth, prosperity and self-sufficiency, mightn't it also be more vulnerable to increasing corporatocracy?