Just like engine oil, it’s important to have the right type of transmission fluid in your car. Adding the wrong type can be very bad. For automatic transmissions, Honda recommends using Honda ATF DW-1. For manual transmissions, Honda recommends manual transmission fluid (Honda branded).
If you’re in a pinch, Honda does allow you to use 5W-20 or 0W-20 engine oil as manual transmission fluid (don’t try this in an automatic, though).