There is a popular Japanese song, in which there is a passage that says "ha ha ha, ha ha ha". What's the name of this song?

According to your description, I personally think it is very useful to suggest that the landlord can try to hum songs on the cool dog, or Netease Cloud and other music recognition software can do it, because it is really difficult to distinguish from the description. I hope the above suggestions can bring you some help, crab crab.