Key Facts
• 1 in 10 individuals now subject to inheritance tax in Japan.
• National Tax Agency enforces stricter measures using “General Rule 6” since 2022.
• General Rule 6 allows tax authorities to adjust asset valuations deemed inappropriate.
• Supreme Court ruling in April 2022 upheld the use of General Rule 6.
• Case example: Tax authorities revalued inherited tower apartments from $33M to $127M.
• Result: $3M additional tax imposed, Supreme Court ruled in favor of tax authorities.
• Another case: Unlisted company shares revalued from $8K to $80K per share.
• Tokyo High Court ruled against tax authorities in one case but reversed in another.
• Key focus: Tax avoidance through asset revaluation or last-minute financial adjustments.
• Tax authorities revised valuation methods for apartments and unlisted shares post-2022.
Summary
Japan’s National Tax Agency has intensified efforts to close tax loopholes for wealthy individuals, leveraging “General Rule 6” to reassess asset valuations. This rule, upheld by the Supreme Court in 2022, allows authorities to adjust valuations if deemed unfair. Recent cases highlight disputes over inheritance tax, including revaluations of tower apartments and unlisted shares, leading to significant additional taxes. While some rulings favored taxpayers, others upheld stricter enforcement. Experts advise caution, particularly for last-minute financial adjustments or undervalued asset declarations. The government continues to refine valuation methods, signaling a tighter regulatory environment for high-net-worth individuals.
