メトロノームでしょう
metoronōmudeshō
1. Probably a metronome.
★ Common
Noun
#1499405
1. Probably a metronome.
1. metronome
1. it seems; I think
2. right?; don't you agree?
1. Of a metronome; Metronome's
1. With a metronome; By a metronome
1. Metronome.
1. If/when a metronome; Provided a metronome is present
1. Was a metronome.
1. It was a metronome.
1. If metronome; When metronome