References 590% CONFIDENCEOverall confidence: 90%How well the pin's source and references back up its dates.Weighted average of how firmly 5 references, the source included, support the pin's start and end times; a reference counts half as much for every 180 days older than the newestShow all pins at 75% confidence or better

The first entry is always the pin's source. Overall confidence is a weighted average of how firmly each reference supports the start and end times used above; a reference counts half as much for every 180 days older than the newest.

• [1]90%
  Sumibiya BB — Nango13 — branch evidence

  sumibiyabb.com· Posted Oct 18, 2026· Starts Oct 1, 2026 ✓· 20% of score

  September17operator opening notice and exact branch page explicitly announce October1,2026opening; the October1–8launch drink price does not extend the promotion.

• [2]90%
  Sumibiya BB — Nango13 — branch evidence

  sumibiyabb.com· Added Oct 18, 2026· 20% of score

  September17operator opening notice and exact branch page explicitly announce October1,2026opening; the October1–8launch drink price does not extend the promotion.^[1]

• [3]90%
  Sumibiya BB — Nango13 — branch evidence

  tabelog.com· Added Oct 18, 2026· 20% of score

  September17operator opening notice and exact branch page explicitly announce October1,2026opening; the October1–8launch drink price does not extend the promotion.^[1]

• [4]90%
  Sumibiya BB — Nango13 — branch evidence

  sumibiyabb.com· Added Oct 18, 2026· 20% of score

  September17operator opening notice and exact branch page explicitly announce October1,2026opening; the October1–8launch drink price does not extend the promotion.^[1]

• [5]90%
  Sumibiya BB — Nango13 — branch evidence

  sumibiyabb.com· Added Oct 18, 2026· 20% of score

  September17operator opening notice and exact branch page explicitly announce October1,2026opening; the October1–8launch drink price does not extend the promotion.^[1]

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