The debate continued even after he returned to Mt. Hiei-zan and he authored "Hokkekowaku," "Shugo-kokkai-sho" (An Essay on the Protection of the Nation), "Ketsu-gonjitsu-ron" and "Hokke Shuku" (The Outstanding Principles of the Lotus Sutra), but since both Saicho and Tokuitsu died before the debate ended, Saicho's disciples ended the debate by announcing that Tokuitsu's assertions were entirely outdebated.
論争は、比叡山へ帰った後も続き、『法華去惑』（こわく）『守護国界章』『決権実論』『法華秀句』などを著したが、決着が付く前に最澄も徳一も死んでしまったので、最澄の弟子たちが徳一の主張はことごとく論破したと宣言して論争を打ち切った。