Simple Joy Moomin mug was launched two months after the MVP 2026 Moomin mug. This one is also a Japan-exclusive mug, meaning it is only sold in Japan. However, unlike the peach-colored Moomin Valley Park version, this one is available outside of the theme park as well.

Another, perhaps the biggest, differentiating factor is that this was not a limited 10,000-piece edition. The production numbers for this blue-colored version were never announced.