As I've posted before, you can definitely safejump Yosuke's DP with the correct timing, it's just really unforgiving. And you can never safejump Kanji's DP with a non-persona attack, don't bother.
For Kanji, you can play RPS with him by using safejump j.B / jump air backdash zio / j.C ZC. You can also meaty 5C and react to the dp but you are vulnerable to grabs. You can also try to use 5D for oki after 214B ender.