  The neutron lifetime is one of the basic parameters in the weak interaction,
and is used for predicting the light element abundance in the early universe.
Our group developed a new setup to measure the lifetime with the goal precision
of 0.1% at the polarized beam branch BL05 of MLF, J-PARC. The commissioning
data was acquired in 2014 and 2015, and the first set of data to evaluate the
lifetime in 2016, which is expected to yield a statistical uncertainty of
O(1)%. This paper presents the current analysis results and the future plans to
achieve our goal precision.
