Is there a phrase/idiom similar to 'critical mass'?


I doubt the literal equivalent 臨界量 is likely to work here.

I'm speaking in the sense of a community activity, where a critical mass of
people is required in order for it to survive. e.g. if a group of 10 people
meet weekly to do something (e.g. playing poker, going hiking, etc.) it's
likely to continue to happen, while if only 2-3 people are interested it's
likely that the desire to continue will disappear and it becomes difficult to
encourage new people to join.

Is there something similar I could use to refer to this concept?




クリティカルマス or クリティカル・マス is widely used as marketing jargon, but this only refers
to a nationwide market share of a new product/service. When describing smaller
community activities, I don't think there is a good and short phrase. Some
ways to rephrase it would be:

  * 持続可能な最低限の人数 (lit. "minimum sustainable number of people")
  * 次回以降に安定して続けていける人数
  * 次からもやれそうなだけの人数

臨界質量 and 臨界量 don't work in this context.




クリティカルマス or クリティカル・マス is widely used as marketing jargon, but this only refers
to a nationwide market share of a new product/service. When describing smaller
community activities, I don't think there is a good and short phrase. Some
ways to rephrase it would be:

  * 持続可能な最低限の人数 (lit. "minimum sustainable number of people")
  * 次回以降に安定して続けていける人数
  * 次からもやれそうなだけの人数

臨界質量 and 臨界量 don't work in this context.

