折
(Ori)
on the occasion of / when.
Connection rules
- +V plain + 折(に); noun + の + 折(に).
- +Formal 'on the occasion of' — more polite than とき or 際.
- +Common in polite correspondence: お近くにお越しの折には ('when you come near us').
Examples
1.
お近くにお越しの折には、お寄りください。

O chikaku ni okoshi no ori ni wa, o yori kudasai.
When you come near us, please drop by.
「on the occasion of / when」
2.
結婚式の折には、彼も出席した。

Kekkonshiki no ori ni wa, kare mo shusseki shi ta.
On the occasion of the wedding, he also attended.
「on the occasion of / when」
Practice
When you come to Japan, please be sure to contact me.
___、ぜひ私にご連絡ください。
Romaji also accepted