Yodobashi Camera Multimedia from Ueno is not actually a narrow building, but the proportions of its northern corner, located close to the Ueno Station, justify its presence in the narrow building category.
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Yodobashi Camera Ueno
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Right near the building there’s the entrance to the low-cost shopping area Ameyayoko-cho:
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Ameyayoko-cho entrance, Ueno
On the other side, the building is bordered by Chuo-dori, the famous street going towards Akihabara:
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The Yamanote and Keihin-Tohoku train lines are passing close to the 3rd floor of the building:

Yamanote train passing near Yodobashi Camera Ueno