Shinanomachi is the site of an apartment that becomes a point of uncertainty when Fukaéri disappears. She said she would stay there after leaving Okutama for Tokyo, but never arrived; the mismatch between her announced destination and her actual whereabouts makes the apartment central to the search and to Tengo’s suspicion that she has been taken.

The Apartment as an Intended Destination

Three days before Komatsu speaks with Tengo, Fukaéri leaves Okutama for Tokyo, accompanied to the station by Professor Ébisuno. She does not tell him where she is going. Later, she phones to say that she will not return to the mountains and will spend the night at the Shinanomachi apartment. Professor Ébisuno’s daughter is also there that day, but Fukaéri never comes to the apartment. Since then, she has made no contact.

A Warning Kept from Komatsu

When Komatsu asks whether Fukaéri has contacted him, Tengo says that he has heard nothing. He remembers, however, that more than four weeks earlier Fukaéri had spent a night at his own home and had told him it would be better not to return to the Shinanomachi apartment. Tengo considers telling Komatsu about that warning, but stays silent. He does not want to reveal that she had slept at his place, leaving Komatsu to assess her disappearance without a detail that might make the apartment’s significance clearer.

From Address to Suspected Trap

Komatsu regards the silence as abnormal: Fukaéri, he says, has been clear about where she is and where she is going, and Professor Ébisuno confirms that pattern. Later, unable to sleep, Tengo considers the possibility that the Pioneers used Fukaéri as a living lure and abducted her. In his reconstruction, members of the group watched the Shinanomachi apartment and seized her when she appeared, forcing her into a car. Her earlier warning takes on a darker possible meaning: she may have sensed danger connected to the address.

Narrative Significance

The apartment is never shown as the site of a confirmed abduction; the kidnapping remains Tengo’s hypothesis. Its importance comes instead from the gap between Fukaéri’s stated plan and her disappearance, sharpened by the warning Tengo conceals. The address gathers several uncertainties into one place: whether Fukaéri was being watched, what she feared, and whether the Pioneers acted to suppress the story of the Little People and the Air Chrysalis. Shinanomachi thus marks the point where an ordinary destination becomes a possible threshold into coercion and silence.