Board Thread:Theories and Speculation/@comment-32891032-20170919081809/@comment-32891032-20170919132916

indeed, Tsunade and Sakura's Seal is a Fuinjutsu, not a Medical Ninjutsu.

But about the "In'yu Shometsu" (Kabuto's jutsu that i forget...thank you for reminding me), i think it's a very specific use of Medical Ninjutsu (Yang release) mix with a specific Yin Release who can activate strongly the response of the organism to allow a better healing. Tsunada use an alternate technique to activate all the cells of Rock Lee in the same time to increase his chance of healing while she lead the operation.

As we know....if the Yang Release affect Life, the Yin Release can affect Spirit or change the nature of thing (the Nara Clan can provide solid form for their shadow and mystic power for imiting movement)

(That's all theory too...i don't say i know everything, i just want to share opinion and ideas with you)