E1
Episode #3.1
Where to watch
Not streaming yet
Coming soon
No streaming availability found for Underneath anywhere yet.
Seasons & Episodes
E2
Episode #3.2
E3
Episode #3.3
E4
Episode #3.4
E5
Episode #3.5
E6
Episode #3.6
E7
Episode #3.7
E8
Episode #3.8
Cast
More like this
Underneath — streaming FAQ
Which OTT platform streams Underneath?
Underneath isn't streaming anywhere in Japan yet.
Is Underneath on Netflix?
No, Underneath is not on Netflix in Japan as of August 2026.
Is Underneath on Amazon Prime Video?
No, Underneath isn't on Amazon Prime Video in Japan right now.
Where can I watch Underneath for free?
Underneath isn't streaming in Japan yet, so there's no way to watch it free at the moment.
How many seasons does Underneath have?
Underneath has 3 seasons so far.
Are all episodes of Underneath out yet?
The 3 released seasons of Underneath are complete, but the show is still in production — a new season is expected.
Is there a Season 4 of Underneath?
A Season 4 of Underneath hasn't been officially confirmed yet.