According to the old website of Kunihito Noritomo, an employee from the compositing studio Sanko Production, this is the work of Tadayoshi Yamamuro. This sequence and the Magna Garurumon sequence were directed by Masatoshi Chioka.

This page has credits for all of the Frontier BANK Sequences: http://www.nona.dti.ne.jp/~norikuni/digimonslist.htm