納入申告書の提出期限までにその提出があつた場合（納入申告書の提出期限後にその提出があつた場合において、次項ただし書又は第八項の規定の適用があるときを含む。以下この項において同じ。）において、第七百一条の九第一項又は第三項の規定による更正があつたときは、市町村長は、当該更正前の納入申告に係る課税標準額又は税額に誤りがあつたことについて正当な理由がないと認める場合には、当該更正による不足金額（以下この項において「対象不足金額」という。）に百分の十の割合を乗じて計算した金額（当該対象不足金額（当該更正前にその更正に係る入湯税について更正があつた場合には、その更正による不足金額の合計額（当該更正前の納入申告に係る課税標準額又は税額に誤りがあつたことについて正当な理由があると認められたときは、その更正による不足金額を控除した金額とし、当該入湯税について当該納入すべき金額を減少させる更正又は更正に係る審査請求若しくは訴えについての裁決若しくは判決による原処分の異動があつたときは、これらにより減少した部分の金額に相当する金額を控除した金額とする。）を加算した金額とする。）が納入申告書の提出期限までにその提出があつた場合における当該納入申告書に係る税額に相当する金額と五十万円とのいずれか多い金額を超えるときは、その超える部分に相当する金額（当該対象不足金額が当該超える部分に相当する金額に満たないときは、当該対象不足金額）に百分の五の割合を乗じて計算した金額を加算した金額とする。）に相当する過少申告加算金額を徴収しなければならない。
Where a remittance return has been submitted by the deadline for filing it (including the case where it was submitted after the deadline for filing and the proviso to the following paragraph or paragraph (8) applies; the same applies hereinafter in this paragraph) and a reassessment has been made pursuant to Article 701-9, paragraph (1) or (3), the mayor of the municipality must, if the mayor finds that there is no justifiable reason for the error in the tax base amount or tax amount relating to the remittance return before the reassessment, collect an amount of additional charge for understatement equivalent to the amount calculated by multiplying the shortfall amount resulting from the reassessment (hereinafter in this paragraph referred to as the "covered shortfall") by 10 percent (where the covered shortfall (where a reassessment relating to the bathing tax concerned was made before that reassessment, the amount obtained by adding the total of the shortfall amounts resulting from those reassessments (where it was found that there was a justifiable reason for the error in the tax base amount or tax amount relating to the remittance return before that reassessment, the amount obtained by deducting the shortfall amount resulting from that reassessment, and where, with respect to the bathing tax, a reassessment reducing the amount to be remitted, or an alteration of the original disposition by a ruling or judgment on a request for review or an action relating to a reassessment, has been made, the amount obtained by deducting the amount equivalent to the portion reduced thereby)) exceeds the greater of the amount equivalent to the tax amount relating to the remittance return where it was submitted by the deadline for filing and 500,000 yen, the amount obtained by adding the amount calculated by multiplying the amount equivalent to the excess portion (where the covered shortfall is less than the amount equivalent to the excess portion, the covered shortfall) by 5 percent).