I'm not aware if the Japanese planned that far ahead. I do know they wanted a regional hegemony in Asia called the Greater East Asian Co-prosperity sphere but as far as I know, did not include any part of the contiguous United States. Their plans did however, include Australia and New Zealand.
Japan knew it couldn't win a war with the United States, for reasons I will show you in a second.
Let's take a look at the GDP of both nations.
Japan had a total GDP in 1941 of 196 Billion in 1990 dollars.
The US had a total GDP in 1941 of 1094 Billion.
The US had enacted in 1940 the Vinson-Walsh act which increased the size of the USN by over 70%. The same year the US passed its first peacetime draft in its history.
Japan was already stretched with its war in China and an American oil embargo. Japan is very resource poor, and aside of being one of the motivations for invasion, it was also a huge vulnerability.
Japanese planners knew they couldn't win a protracted war. So why go to war? They wanted to demoralize the American public and buy time to build their empire. The Japanese wanted a short war after which the Americans wouldn't interfere in the construction of their empire. Pearl harbor was a stalling attack in other words and the theory went that Americans would sue for peace. The Japanese targeted battleships over carriers because of the prestige associated with the battleships at the time.
Their idea was not completely foolish. The US was still war weary after WWI and the US wasn't completely mobilized yet (the USN fleet was still expanding).
Imperial Japans attitudes toward race undoubtedly played a role in attacking.
Admiral Tadaichi said of Pearl Harbor. "We have won a great tactical victory at Pearl Harbor and thereby lost the war. "
So if anyone in Imperial Japan was planning to actually invade the mainland US, it wasn't taken that seriously by the higher-ups (as far as I know).
" In the first six to twelve months of a war with the United States and Great Britain I will run wild and win victory upon victory. But then, if the war continues after that, I have no expectation of success."
-Isoroku Yamamoto, Fleet admiral of the IJN.
their long term strategic goals were to maintain a large empire and sphere of influence in east asia. if they were to attack the west coast of the United states it would be for the purposes of getting the usa to sue for peace and leave Asia for good.
Well, Pearl Harbor would've been a great opportunity to invade. Considering they didn't occupy Hawaii when they had the chance I think it's safe to assume they had no such intentions at least at the time of the Pearl Harbor attacks.