A Child's Single Shoe Becomes Lineage 122 — Its Craftsmanship Echoes 'the Neighboring World,' Puzzling the Appraisal Center
A single child's shoe found on a Sunamachi street on the night of the 19th did not match any of the 121 known lineages in isotope ratio and was provisionally registered on the 21st as Lineage 122. The Third Appraisal Center says the shoe's stitching and sole construction closely resembles the household items of Lineage 31, previously reported as 'the neighboring world' — the tricycle found in Kameido and others. It marks the first case of a clearly distinct lineage sharing craftsmanship with another, and the Center admits it cannot explain the resemblance by lineage alone.
Around 9 p.m. on the 19th, a woman, 52, walking a street in Sunamachi found a single child's shoe and turned it in at a police box. Sized for a child of around 15 centimeters by local measure, only one shoe was found, with no matching pair recovered. TDA officers collected it and transported it to the Third Appraisal Center, where a first-pass analysis on the 21st found its isotope ratio did not match any of the 121 known lineages, leading to its provisional registration as Lineage 122.
What drew the Center's particular attention this time was not the isotope ratio — the marker of origin — but the shoe's construction: its stitching and sole. The previously reported Lineage 31 — a tricycle, a pot, a wooden box, and a single boot, drifting ashore across five decades and popularly called "the lineage with a strong sense of everyday life" or "the neighboring world" — has produced nothing but household items. Today's shoe registered clearly as a distinct lineage by isotope ratio, but the way its sole is stitched and its toe reinforced nearly matches the technique seen in Lineage 31's previously found boot.
"Since the isotope ratios differ, we have to conclude the originating world line itself is different," a Center official said, not hiding a note of bewilderment. "But it's its own kind of strange, that people on an entirely unconnected world line would stitch things the same way." The Center says it will keep both possibilities open for study: coincidental technical convergence — the idea that the same problem tends to produce the same solution — and some indirect connection between lineages that hasn't yet come into view. As previously reported, Lineage 31, "the neighboring world," has no stable window of its own and no means of direct observation.
The news has already stirred interest among residents following the previously reported Lineage 31. The Center says it received an unusually high number of inquiries on the 21st asking, in effect, "Is this connected to Lineage 31?" A spokesperson could only repeat, "We don't yet have grounds to say either that it is or that it isn't connected." Echoing the previously reported official who handled Lineage 150, the Fukagawa bell, today's official held the same line: "It's too early to judge from a single item."
The woman who found the shoe said, "Just finding one, somehow, made me imagine the person who lost it, and it left me a little wistful." Since the shoe falls under state ownership, no search for its owner will be conducted, but TDA said, "We can't rule out the matching shoe turning up somewhere else eventually" — leaving the story on hold as a possible thread for later coverage.
As previously reported, the Center's pace of new lineage registrations has run at roughly one every two weeks; today's registration, coming just three days after Lineage 150 on Sept. 18, is on the faster side. The Center again urged the public not to read too much significance into shifts in that pace.
Full appraisal is expected to take several months. No safety concerns have been noted so far.
