Executive Summary — 2 John (English → Japanese)

Why it matters

2 John is short — 13 verses — but it is the most doctrinally concentrated text this Language Package has yet processed for Japanese. Every doctrine in the letter carries at least Medium risk; none is Low. The letter’s core passage (1:4–11) packs four major doctrines — walking in truth and love, warning against deceivers denying the incarnation, hospitality and doctrinal discernment, and perseverance in the teaching of Christ — into eight verses, several of which collide directly with distinctive features of Japanese language and culture (romantic-confession slang, karmic-retribution vocabulary, an internally-contradictory reuse risk with the Romans baseline’s own glossary, and Japan’s own celebrated hospitality ethic). Getting this letter right in Japanese requires more active teaching-layer restoration per verse than any prior curriculum in this package.

Key findings

• 17 of 39 tracked terms (44%) are Critical or High risk — 8 Critical (神, 主, イエス, キリスト, 神の子, 受肉, 恵み, 加担する) and 9 High (真理, 愛, 告白する, 惑わす者, 反キリスト, キリストの教え, 神との関係を持つ, 報い, 教えを越えて先走る者).
• 8 of 12 doctrines (67%) require mandatory human theologian review (4 Critical + 4 High); the remaining 4 require native speaker review. Zero doctrines are automated-only — a first for this Language Package.
• One unprecedented cross-reference hazard: v.11’s κοινωνέω shares its Greek root with the Romans baseline’s positive, Low-risk term 交わり (fellowship) but here means the opposite — complicity in evil. This is the single highest silent-error risk identified: a translator pattern-matching to the established glossary could produce a rendering that says the reverse of the source text while looking internally consistent.
• Verse 7 alone stacks four separate Japanese-specific collision risks (incarnation/化身-権化, confession/kokuhaku-culture romance, deceiver/kitsune-tanuki folklore, antichrist/anime-villain trope) — the single highest-density doctrinal-risk verse across this package to date.
• A second unprecedented hazard: κυρία (“lady,” vv.1, 5) shares a Greek root with Κύριος (“Lord,” v.3, already Critical in the baseline); Japanese renderings (婦人 vs. 主) must be kept absolutely distinct even though the English/Greek wordplay is real.

Risks

Risk	Severity	Mitigation
交わり reused for v.11 instead of 加担する	Critical — silent, plausible, cognate-consistent error	Hard validation rule; automatic reject-and-regenerate; mandatory theologian review every occurrence
v.7’s incarnation-denial clause loses cumulative severity even with each word individually “correct”	Critical	Require all four fencing explanations to co-occur in the same teaching context, not scattered
主/婦人 conflation (Lord vs. lady)	High	Absolute reservation of 主 for Christ; validation check for proximity confusion in vv.1–5
告白する read as a romantic confession (“kokuhaku culture”)	High	Mandatory explanatory framing at every occurrence
報い read through 応報 karmic-merit logic	High	Explicit non-transactional framing, parallel to baseline’s 恵み clarification
v.9’s “have God” read as omamori amulet-possession	High	Relational rendering (神との関係を持つ), never literal object-possession phrasing
v.10’s hospitality restriction rejected as culturally offensive against omotenashi	High	Explicit narrow-exception framing in all teaching material
προάγω (“goes ahead”) rendered with positive-progress vocabulary (進歩)	High	Absolute ban on 進歩; periphrastic rendering required

Opportunities

• Japan’s adult-heir adoption practice, Pure Land Buddhism’s tariki (other-power) structure, and the omotenashi hospitality ethic (already flagged as bridges/tensions in the Romans baseline and 04_comparative_theology.md) remain available as teaching bridges for this letter’s grace and hospitality content, provided equivalence is never implied.
• The Orthodox tradition’s strong historic anti-docetic investment offers a genuine comparative-theology bridge for explaining why the physical reality of the incarnation matters (v.7), even to a Japanese audience with no Orthodox exposure.
• This letter’s brevity is itself an opportunity: its full-book coverage was achievable at full doctrinal depth (verse-by-verse) rather than requiring chapter-level summarization, giving Phase 2 translators unusually complete term-level guidance relative to text length.

Recommended actions

1. Load both the Romans-baseline and 2 John translation_memory.json files together for every Phase 2 segment; never process 2 John against the 2 John file alone, since vv.3 and 9 mix vocabulary from both.
2. Enforce the 交わり/加担する fencing rule as a hard pre-submission validation gate, not merely a review flag, given its uniquely high silent-error probability.
3. Route 2 John 1:3, 1:7, 1:9, and 1:11 to human theologian review as a fixed, non-discretionary rule for every translation pass, regardless of apparent segment quality.
4. Require first-occurrence explanatory sentences (not just correct glossary lookups) for all eight “crowded neighborhood” terms identified in 06_linguistic_gap_analysis.md (告白する, 惑わす者, 反キリスト, キリストの教え, 報い, 愛, 真理, 家に迎え入れる) in every teaching document, not only in the core passage.
5. Brief native-speaker reviewers specifically on the omotenashi tension (v.10) and the 応報/karmic-merit adjacency (v.8), since both are cultural-resonance risks that a purely bilingual accuracy check would not catch.