Executive Summary — 1 John Language Package (Japanese)

Why it matters

1 John is being added to the Japanese destination-language curriculum on top of the existing Romans baseline. Unlike Romans, whose highest risks sit in unfamiliar technical vocabulary secular readers simply don’t know, 1 John’s highest risks sit in ordinary, everyday Japanese words (愛 “love,” 光 “light,” 世 “world,” 告白する “confess”) that readers already carry strong, doctrinally competing associations for. The core passage, 1 John 4:7-21, packs the letter’s single highest-density collision — the word 愛 appears 25+ times in 15 verses, each occurrence carrying live risk of being heard as romantic attraction or as Buddhist craving-attachment (the doctrinal inverse of “God is love”). Getting Phase 2 translation infrastructure right before segment translation begins is materially higher-stakes for this book than it was for Romans.

Key findings

• 22 doctrines tracked, of which 10 are Critical and 6 are High risk — a higher risk concentration across just 5 chapters than the Romans baseline showed across 16.
• 51 terms now in translation memory for this curriculum (11 inherited exactly from the Romans baseline + 40 newly introduced by 1 John), of which 16 are Critical-tier and 13 are High-tier — 29 terms total requiring mandatory human theologian review on every occurrence.
• The letter’s two thesis statements — “God is light” (1:5) and “God is love” (4:8, 16) — are both Critical-risk identity claims about God’s essential nature, each independently requiring the baseline’s 唯一のまことの神 qualifier treatment.
• A genuinely novel structural risk was identified: at 4:1 (“test the spirits”), bare 霊 without the usual 聖 qualifier is the doctrinally correct rendering — the one exception to an otherwise absolute rule everywhere else in the combined Romans + 1 John package. This inversion is the single highest risk of reviewer/automated over-correction in the whole package.
• Full-book coverage confirms no chapter of 1 John is doctrinally inert: every chapter (1–5) contributes load-bearing vocabulary or doctrine not repeated at the same density elsewhere.

Risks

• 愛 (love): dual collision — secular romantic-attachment default and inherited Buddhist craving-to-be-extinguished default — both inverting 1 John’s claim that love is God’s own highest nature. Highest-frequency, highest-centrality risk in the curriculum.
• 光 (light): simultaneous collision with Amaterasu solar-imperial mythology and Amida Buddha’s Pure Land “Immeasurable Light” devotion — two live competing frameworks at once, unmatched elsewhere in the package.
• 神から生まれる (born of God): the doctrinally safe rendering is deliberately less fluent than the natural-sounding but contaminated alternative (生まれ変わる, the isekai reincarnation-genre idiom) — normal editorial “smoothing” instinct works directly against doctrinal safety here.
• 神の子 vs. 神の子どもたち: bidirectional dilution risk (Christ’s uniqueness diluted upward, or believers’ real family status under-credited) requires checking two related strings against each other, not just against a forbidden-terms list.
• 告白する: identical Japanese word serves both sin-confession (1:9, Medium stakes) and Christ-confession (2:23; 4:2-3,15; 5:1, Critical/High stakes) — risk of uniform, insufficiently escalated review treatment.
• なだめの供え物 (propitiation): live folk-religious tatari-appeasement association risks a reluctant-deity picture if ever quoted without 4:10’s “God himself sent” framing attached.
• 偶像 (idols, 5:21): unusually concrete pastoral risk given the ubiquity of butsudan/kamidana/omamori in ordinary Japanese family life, including believers’ own relatives.

Opportunities

• 1 John’s adoption-adjacent “born of God” birth metaphor and Romans’ “adoption” (子とされること) legal-heir metaphor can be taught together as complementary, non-contradictory pictures of the same reality, reinforcing rather than duplicating baseline material.
• Verse 4:11’s genuinely legitimate use of debt/obligation language (ὀφείλομεν, “we ought”) offers a rare positive teaching bridge into Japan’s on-giri reciprocity instincts — provided the obligation’s direction (horizontal, to fellow believers, not vertical repayment to God) is taught explicitly, this is an asset rather than a liability.
• Japan’s adult-heir adoption practice, already a positive bridge for Romans 8, can be cross-referenced when teaching 1 John 3:1-2’s “children of God,” provided the two family-status metaphors (adoption vs. new birth) are kept distinct rather than merged.

Recommended actions

1. Merge assets/translation_memory.json (1 John) and assets/doctrine_risk_registry.json (1 John) into the Phase 2 pipeline alongside — never in place of — the Romans baseline versions, per the loading order specified in analysis/12_ai_translation_requirements.md.
2. Route all 29 Critical/High-tier terms and all 16 Critical/High-tier doctrines to mandatory human theologian review before any Phase 2 segment is marked approved, with special reviewer training on the single structural exception at 4:1 (bare 霊 required, 聖霊 forbidden) to prevent well-intentioned but doctrinally destructive “correction.”
3. Build a standing QA check that cross-validates every occurrence of 神の子 against every occurrence of 神の子どもたち within a document, rather than validating each string independently.
4. Brief native-speaker reviewers specifically on the letter’s inverted risk profile (fencing familiar words vs. explaining unfamiliar ones) so review effort is not under-allocated to segments that look lexically “easy.”
5. Prepare a short pastoral-framing note for 5:21 (idols) for use wherever that verse is taught, to avoid inadvertently condemning ordinary household religious objects common among believers’ own families.