Machida Sekizai Alley (町田石材店前の路地) 町田石材店

The alley in front of the stonemason's, recognised by the three shop awnings lined up on the left-hand side, in the flashback where Shōhei complains to Rintarō in class (episode 2). Nearby, below the threshold: the 広尾児童遊園地, 95 m to the south-west, which the two pass on their way back from studying in episode 4; and, 150 m to the west, in front of the 広尾ハイツ, where in episode 5 Saku (who has just argued with Rintarō and gone home alone) is stopped by Shōhei and Yoda.

It is at 5-16 Hiroo, 220 m from Hiroo Station, which fits with the fact that in the first episode Rintarō uses that very station.

Tokyo

Hiro-o

The Fragrant Flower Blooms with Dignity

The alley in front of the stonemason's, recognised by the three shop awnings lined up on the left-hand side, in the flashback where Shōhei complains to Rintarō in class (episode 2). Nearby, below the threshold: the 広尾児童遊園地, 95 m to the south-west, which the two pass on their way back from studying in episode 4; and, 150 m to the west, in front of the 広尾ハイツ, where in episode 5 Saku (who has just argued with Rintarō and gone home alone) is stopped by Shōhei and Yoda.

All the places from The Fragrant Flower Blooms with Dignity

https://theanimetrip.com/luoghi/vicolo-della-machida-sekizai