TIL 21 years is not enough time to notice confusing signs.

Two signs pointing at each other (I've seen way more of this but here is one example): https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcSe-8IR...

In addition to signs pointing to each other, you also see several signs at once pointing to the same thing in opposite directions: https://skyticket.jp/guide/wp-content/uploads/pixta_46188735...

Or signs pointing the same direction for both East and West exits: https://basyauma.com/wp-content/uploads/2020/01/IMG_5141-2-1...

and https://owl-eat-drink.s3.ap-northeast-1.amazonaws.com/tokyo/...

Same thing at Ikebukuro: https://www.reddit.com/media?url=https%3A%2F%2Fpreview.redd....

There are many, many more examples of this.

Yes they are. Every time I visit Tokyo I try to avoid Shinjuku because it is extremely confusing and I always get lost.

Signs are mostly useful for people who are new to a place, if you need a significant amount of time to familiarize yourself then they are useless.