  We present a detection of a bright burst from FRB 20201124A, which is one of
the most active repeating FRBs, based on S-band observations with the 64-m
radio telescope at the Usuda Deep Space Center/JAXA. This is the first FRB
observed by using a Japanese facility. Our detection at 2 GHz in February 2022
is the highest frequency for this FRB and the fluence of $>$ 189 Jy ms is one
of the brightest bursts from this FRB source. We place an upper limit on the
spectral index $\alpha$ = -2.14 from the detection of the S band and
non-detection of the X band at the same time. We compare an event rate of the
detected burst with ones of the previous research, and suggest that the
power-law of the luminosity function might be broken at lower fluence, and the
fluences of bright FRBs distribute up to over 2 GHz with the power-law against
frequency. In addition, we show the energy density of the burst detected in
this work was comparable to the bright population of one-off FRBs. We propose
that repeating FRBs can be as bright as one-off FRBs, and only their brightest
bursts could be detected so some of repeating FRBs intrinsically might have
been classified as one-off FRBs.
