Game Box Protectors – Japanese Sizes Part II

Box protectors for games started popping up around 20 years ago, and are a great way of keeping vintage games protected but still accessible and playable. However it has taken a very long time for certain box sizes to get protectors that fit properly, particularly Japanese box sizes.

In my previous post on the topic, I looked at some (at that time) newly available sizes for Japanese Game Boy and Game Boy Color games, as well as some custom protectors I had produced for Japanese Sega games, plus some suggestions I had used for certain other types.

Well, progress marches on, and there are even more sizes available today. Better yet, Chinese producers have gotten in on the game, meaning cheaper prices direct from China, versus resellers in various countries all over the globe with big markups and sometimes very expensive postage.

Custom protectors for Famicom medium and small boxes

Previously I’d been using Japanese Game Boy Advance protectors for my ‘mid size’ Famicom boxes. They had a bit of room to move, but it was the best option at the time.IMG_5419

But now there is a custom snug fit option.


Similarly, previously I’d been using protectors designed for Nintendo 64 cartridges for small box Famicom games.


They were not the greatest as they were a bit tight width wise, but worked okay due to being taller. But now there’s a custom snug fit for these too.


It’s hard to tell from the front, but you can see the better fit more clearly from the side.


Sega Mark III

This one had me quite excited. I’d previously had some custom boxes made for my Sega Mark III and SG1000 games of various sizes, as no other sizes were close enough for an adaptation. These custom ones were quite expensive!


But now there’s a regular commercial option, at least for the most common Gold Cartridge size.


It also has a small upgrade, a circular cutout to help open the box flap with less risk of damage.


That’s about it for now. I’m still waiting on custom sizes for the SG1000 small box, Sega My Card SG1000, and Sega My Card Mark III. They may be too obscure to ever get any, but hopefully one day!


8 thoughts on “Game Box Protectors – Japanese Sizes Part II

  1. Sega Dude January 24, 2022 / 1:58 am

    Love this! Where are you buying the Sega Mark III case protectors from?
    I’d love to get some myself.


  2. Sega Dude January 24, 2022 / 5:34 am

    I had a look but and the protectors look great but shipping is a killer.

    Order Summary

    C$ 96.08 (50 Mark III cases)

    – C$ 3.84

    C$ 42.35

    I may consider it later but don’t feel like spending that right now.

    Thank you for the link!


  3. soup32 September 19, 2022 / 9:22 am

    Where were you able to get box protectors for the big box SG-1000 games, and the SG-1000 my card titles?


  4. Bob November 24, 2022 / 10:10 pm

    If you want hard cases you should check out RetroShell – I have found the soft cases can warp the boxes if you stack them (but hard cases are not cheap)


  5. soup32 February 19, 2023 / 9:02 am

    Vita box protectors fit the SG-1000 card games quite well.


    • D.Lo February 19, 2023 / 3:14 pm

      Great tip, will try it!


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