日本のお勧めスポットを紹介します。って英語でなんて言うの？

If a friend is visiting Japan from abroad, depending on your relationship, you may be quite forward and presumptuous, as in the first sentence, or, more tentative and formal, as with the second example.

Both of these phrases will work when talking to your friend abroad. The first is telling the person you will be their tour guide. A tour guide is someone who shows people around and gives them recommendations and facts about a city. The second one is just notifying them that you have places that you would like for them to see while on their trip to Japan.

Looking forward=excited to do in future. Lots = many or plenty. Some = adjective describing places. Unspecified amount

If you want to say to someone about showing them places/sightseeing spots that are good then you could say 'I would like to show you some great places/spots in Japan' or ' I have some great places/spots to show you in Japan' By adding 'when you're here' or 'when you are in Japan' means you will show them personally and not a photograph

A favorite "hangout" is a place that you like to eat, drink and relax with friends with. You may go to this place often and be very familiar with it so you can suggest your favorite hangout to your friend to try. When you want to show some favorite "sights and sounds" these may be places that you would suggest to go sightseeing(sights) or even listen to music(sounds). Perhaps a club or concert location that a lot of local people like to go to. "Must see" locations are places that are typically very famous and well know. When you want to show your top locations that means you want to show them your favorite tourist destinations in Japan that you think they would like a lot.

You can refer to a certain location as a "spot". It is used in general terms but is vague as to what the actual location is.

You can use these phrases to explain to your friend from abroad that you desire to, and would enjoy being able to introduce them to some of your recommended spots. By saying "I would really like to be your tour guide and show you some of my favourite places" it shows you wish to mimic a tour guide's role.