I'm just introducing periscope encounters! If you're looking for periscope encounters, then periscope encounters are still the way to go!
(Note: The phrase "潜望鏡出会い" literally translates to "periscope encounter," but this term might not have a direct cultural equivalent in English. Depending on context, it could refer to meetings or connections made through a specific app or method, similar to how some Japanese terms might be tied to certain technologies or social phenomena.)
If this is about a specific app or service, additional clarification may be needed for a more natural translation.