First the price is set to maximize profits, nothing else.

The reason it’s cheap in Japan is probably because the value is low for Japanese people, they don’t want to pay more, the price they’ve set is the balance between how many subscribers they can get to maximize the total revenue and profits.

In India I imagine the value for the individual might be better, but it’s a poor country, so the low price is necessary for people to afford it.

Second they have copyright deals that vary greatly by region, so cost and content can vary greatly too.

But you can be 100% sure that the low price in India isn’t because they want to be nicer to the Indians. It’s because that’s the price that will earn them the most money.