As defined here: (click the JUTSU button in the center of the page)

http://www.shishi-rendan.com/index.php?module=nh3moves

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Taijutsu (hand to hand) will clash with all abilities except Ninjutsu
Ninjutsu (ninja skills) will clash with all abilities except Taijutsu
Tokujutsu (shield/wall) will clash with all abilities except other Tokujutsu
Chargeable Jutsus will clash with almost all abilities (special cases)