ChatGPT Plus lists at $20 a month but the real cost varies by country and...

https://stateofseo.com/how-much-is-chatgpt-plus-in-japan-%c2%a53000-and-does-it-bill-in-yen/

ChatGPT Plus lists at $20 a month but the real cost varies by country and device. That’s because taxes like VAT or GST and fees from app stores get added on top. Buying through an app store often means a higher price due to their markup