I don't remember that scenes, but most likely they just don't know that barrier exists.

They know barrier exist. Delta is worried but kashin koji just jumped in and keep walking. But when delta cross barrier ino immediatly inform naruto, someone is coming toward.

Nice to know. I should rewatch the whole manga after the Momoshiki fight. Thx.

I mean at the end of the day is he has Jiraiya’s DNA, then the barrier of chakra detection detects Jiraiya’s chakra as he entera Konoha as friendly, so it doesn’t pop off. Though, that said, it’s weird if they see “oh Jiraiya popped by” and everyone’s like “yeah, that makes sense” lol.

Yup but rather than he use rare jutsu that allow to copy someone chakra. Beside this sensori system detect unregisterd chakra. So i am not sure if sensori deparment also seeking who is entered in village. Both condition are true on some places.

Right it’s kind of a weird thing lol

Pretty sure jiraiya's body didn't decay and got brainwashed by Kama

Maybe but not confirmed

Today episode 205 episode is coming. I hope in this episode we know about koji kashin.

@Martin Poblador then why the look of jiraya has changed. I think he is shinobi from minato's time or like some under cover shinobi that take eye on kara.