atowaito

It's not, it says "episode 9 out of 30 airing in". It's not about episode 1.

Chinese with Japanese subs.

We need to hope that an international platform like Viki picks it up as well. But I'm sure the fans will provide subs once it airs. There are ways :)

On WOWOW it'll be in Chinese with Japanese subs.

It's because WOWOW hasn't updated their schedule past March yet, so the last episodes in the schedule currently are episode 7 and 8 which will air on March 28th. They should update their April schedule in around a month.

WOWOW is a big TV station in Japan, the announcement says it'll air all 30 episodes and it's very trustworthy. They are also airing The Spirealm at the moment.

For anyone wondering: WOWOW is the Japanese TV station that is currently airing The Spirealm in Japan, so I personally have very high hopes.

For those confused about the schedule: WOWOW literally updated their March schedule today, right before announcing Justice in the Dark, so that's probably why they only show their schedule until March 28th. I'm sure that they'll update with more episodes next month.