This corpus comprises 8,000 Japanese digit strings uttered by 200 speakers of different dialects, ages and various educational levels, recorded over 4 channels. Speech samples are stored as a sequence of 16-bit 48kHz WAV for 20.88 hours of speech per channel. The total capacity of the data is 23.23 Gb.Each speaker read 40 items. Text files are stored in Unicode format. All data have been proofread manually.The corpus aims to be applied to the testing and telephone natural speech recognition system. This corpus is partly included in ELRA-S0228-54.