おととし

おととし
noun
year before last
formalwritten
1. year before last
The year two years ago from the current year.
I went to Japan the year before last.
The summer of the year before last was hot.
He graduated from university the year before last.
A friend who got married the year before last had a baby.
Going skiing in the winter of the year before last was fun.

おととし means 'the year before last' (two years ago).

Writing

Written as 一昨年(おととし) in formal contexts. Also read as 一昨年(いっさくねん) in very formal/written Japanese.

Year sequence

Similar pattern

Usage

More common in spoken Japanese; 一昨年(いっさくねん) is preferred in formal writing.