noun
bad year for fruit; off year
Used in agriculture and forestry for a year when fruit or nut harvests are poor, often in contrast with 表年 (good year).
Antonyms: 表年
今年は裏年で、柿の実がほとんどならない。
This year is an off year, and the persimmon tree bears almost no fruit.
noun
low pollen year
Extended use from the agricultural sense; refers to a year with low pollen counts, especially for cedar and cypress pollen allergies.
裏年だと花粉症の症状が軽く済むことが多い。
In a low pollen year, hay fever symptoms are often milder.