We do have some series like Chi's Sweet Home which is very child friendly but also fun for all ages. But our service is more suitable for teens and adults at the moment so you would need to guide your kids on Azuki so they don't read other types of content. We have discussed adding better filtering for age groups so that is something we are considering.

This is, to me, a vital feature.

My niece loves manga, and I would buy her a subscription, but there would have to be some kind of age filtering. What I would personally love would be the ability to select exactly which series she can read, as sometimes simple age restrictions aren't good (some teen series are fine, others really aren't).

We've kept age filtering in mind even before we launched but haven't been able to prioritize it yet even though we agree and want to support it. But we hadn't thought of allowing a guardian to select the things a kid can read which is a wonderful idea! We'll keep that one in mind when we get around to age and content filtering.

Different cultures have different ideas of what "child friendly" means. As an example, Sailor Moon was targeted at 8yr old girls in Japan but deals with topics that many parents in the USA are not comfortable with for 8yr olds. For example lesbian relationships (I'm not making a judgement on that, only pointing out the fact that many USA parents would object to that topic for their 8yr olds and in fact that facet of Sailor Moon was edited out of the USA anime version).

Another example is One Piece which is also targeted pretty young but nearly every female character dresses super sexy and one of the main characters smokes at every opportunity.

Also, in general manga != for kids. There are tons of very adult manga and I don't just mean porn manga, I mean manga about adult topics targeted at adults. There are similar adult comics in the USA but the selection and market is arguably a order of magnitude or more larger (by percentage) in Japan.

Manga is a medium and basically spans the whole gamut, similar to books. You'll find kid friendly adventures, adult thrillers and everything in between.

Just checked their website, and I could see both teen and adult titles.