Verified answer

If you go to a bookstore and find any Japanese dics for Japanese people, any of them will tell you that the word "都内" means only a certain part of Tokyo--On-line dics are often not reliable.

When we say 都内, we don't usually refer to entire Tokyo but only to eastern part of Tokyo, which is called twenty-three special wards, even though the word 都内 literally means 'inside Metropolis'.

The part that we usually call 都内 is painted light green in the following Wiki site, and this is what you usually see on TV screens when 'Tokyo' is being referred to.

http://en.wikipedia.org/wiki/Special_wards_of_Toky...

http://www.thsc.or.jp/img/common/mainImg.jpg

The rest of Tokyo consists mainly of cities, with several towns and villages. In the western-most part of Tokyo, you can enjoy lots of green nature with many kinds of birds, which often surprised people from abroad. That's also part of the administrative area called Tokyo, but is not usually included when we say "都内".

Here in the following sites, you can see how the western-most parts of Tokyo look like.

https://www.google.co.jp/search?hl=ja&site=imghp&t...

This term 都内 とない Tonai and とない and 東京都内 とうきょうとない is used for entire Tokyo. Examples.

都内

Tonai

The Tokyo Metropolitan area

スーパーが都内にオープン

Sūpā ga tonai ni ōpun

Supermarket Open in Tokyo

都内の駅

Tonai no eki

Station in Tokyo

It seems in your Manga the Jewelry shops were in Tokyo.

Hope above information will be helpful.