～折には

When to use

Formal, literary, ceremonial "on the occasion of". (Near-duplicate of n1-240's 折に, with は added.)

Explanation

The ～折には grammar point is used to emphasize a specific moment or situation (often not very frequent). It can be translated as 'when (the occasion arises)' or 'in case of'.

• 喉のどが渇かわく折おりには、このペットボトルの水みずを飲のんでください。

  When you get thirsty, please drink water from this bottle.

  Nodo ga kawaku ori ni wa, kono pettobotoru no mizu o nonde kudasai.

• この地域ちいきに来くる折おりには、この神社じんじゃに必かならずお参まいりしましょう。

  When you visit this area, make sure to go to this shrine.

  Kono chiiki ni kuru ori ni wa, kono jinja ni kanarazu omairi shimashou.

• 彼かれが元気げんきじゃない折おりには、具合ぐあいが悪わるいか尋たずねてください。

  If he doesn't seem well, please ask if he's feeling sick.

  Kare ga genki ja nai ori ni wa, guai ga warui ka tazunete kudasai.

• チャンスがある折おりには、躊躇ちゅうちょせずに行動こうどうしましょう。

  When you have an opportunity, act without hesitation.

  Chansu ga aru ori ni wa, chuucho sezu ni koudou shimashou.

Occasion (While Doing / On The Occasion Of)

• ～際に〜sai niN2Means 'when', 'while', or 'on the occasion of' a certain…
• Noun がてらNoun gateraN1Means 'while...at the same time', 'on the occasion of', or…
• ～に際して〜ni saishiteN2Used to express the moment or the occasion of an action…
• ～にあたり〜ni atariN2Expresses the meaning of 'at the time of', 'in', 'on', or…
• Noun かたがたNoun kata gataN1Do one thing while also doing another; 'while', 'and at…

Compare when to use each