The answer is~ It’s a board that you stand on to sing while recording something, so it’s called dai-hard? Or Die-hard, when you stand on this thing your voice gets stronger so even the fainter sounds won’t go missing! Isn’t that weird? Plus, it works better if you don’t wear shoes to stand on it so I always take my shoes off (so Japanese?) . It’s half the size of a tatami mat but costs about 100 000 yen! This one is mine and mine alone.