Some people say that Nintendo products are only geared toward children, with all their cutesy-wootsy Pokemon games and pudgy cartoon plumbers clad in red overalls. With the launch of the DS Opera web browser, they’ve opened up a big can of worms, letting their portable gamer access the big, scary internet. Parents can rest a little easier though, knowing that there is an optional porn blocker available.

Designed by Digital Arts Inc. of Japan, the i-Filter is a service that is designed to filter out the nasty bits that can be found on the interweb. Although the “undesirable” content is mostly pornographic in nature, it probably also blocks out other stuff you wouldn’t want your underage child looking at. They’ve made sure that the filter isn’t too strict either, with Digital Arts employees personally ensuring that non-offensive sites are not blacklisted.

Unlike the DS Opera browser itself, which is a one-time purchase, the i-Filter is an ongoing service, costing users a monthly fee of 315 yen (less than US$3, but multiply that through a year and you’re looking at thirty bucks). A small price to pay, I suppose, for a little piece of mind.