Many cities and towns in Japan have a policy of subsidizing the costs of having cats and dogs spayed or neutered. The city often sets aside a certain amount of money for this sort of subsidization per year and then when the money runs out, they stop providing the subsidies. If your pet needs this kind of operation, be sure to contact your city government to find out if it offers something like this. Also, you might want to do it earlier in the fiscal year (in the months following April) rather than later so that you have a chance of benefiting from the subsidy.

Here is an example of one such program in Adachi-ku, Tokyo. (It is the latest post on the page, so it is currently right at the bottom. If you can’t find it, use the “search” function in your browser to find occurrences of “Adachi-ku”.)

I know that Tsukuba, Ibaraki also offers this kind of subsidy, but I recently read that the funding is running out for this year, so if you want to take advantage of this program, contact the City Hall soon!