折角

折角 is used to emphasize that a lot of effort or a special circumstance has been invested, so the following outcome or decision should be viewed with that effort in mind. It can express disappointment when things don’t go as hoped (折角なのに…), or politely frame a suggestion or course of action by stressing the value of the occasion (折角ですから…). Common contexts include travel, opportunities, and occasions where someone has gone out of their way to do something, or when you want to remind someone that the rare opportunity should be used wisely.