if you get to Jigoku* from small area pits, you have two chances to go back in real world:
a) from Enma-daiou**, assuming you get the right chest and anyway you can't do it more than four times;
or
b) paying at least 70 zeni*** by entering into a blood pool;
Since blood pool teleports you into Kyoto even in later stages, and you can obtain 70 zeni easily even without trying, I guess there is an infinite pattern here?
And if yes, how to regulate it?
* Hell
** Satan
*** Money, I have 98 in the snap btw