Mysterious Creatures vs 不思議コレクション 大人の図鑑
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
Mysterious Creatures
Engage in a unique seek-and-find experience by sifting through virtual shirasu to discover hidden sea creatures. Collect a variety of miniature marine life, from baby shrimp to tiny squid, and build your personal collection of these elusive finds.
- Sift through virtual shirasu
- Discover hidden sea creatures
- Collect miniature marine life
- Build a personal collection
- Hint system for assistance
- Save game progress
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Find the mysterious sea creatures lurking in the shirasu! What's shirasu, you ask? Shirasu, also known as whitebait in English, are the small young of fish like sardines and anchovies. They are very small and are used as a garnish or topping in many Japanese dishes, most commonly found as a simple topping for rice. Shirasu are caught in large batches and have an opalescent white color and resemble super tiny fish! They are cooked and salted lightly after being caught. Their close culinary cousin are chirimen, which are baby sardines that have been fully dried. Shirasu, on the other hand, are only partially dried, and have a softer consistency. They're a delicious and simple way to spice up a plain bowl of rice and an everyday part of cuisine in Japan. But... there's more to them than meets the eye! Because the small fish are caught in large batches, occasionally another miniature deepsea creature gets mixed into the shirasu. They're harmless, but you can sometimes find a mini squid, baby shrimp, or tiny fish in the mix! Of course, some are more rare than others, but this kind of seek-and-find suspense has caught on big with children and adults alike. Think of it as the deep-sea version of breakfast cereal... This game simulates the experience of sifting through the shirasu to find mysterious little beasts. See if you can collect them all! How to Play - Using your fingers, sift through the shirasu and look for mysterious creatures. Tap one to add it to your collection. - Pressing the pause button at top right will allow you to look through your collection. - Pressing the Twitter button will allow you to tweet the number of samples you've caught of the selected specimen. - Pressing the magnifying glass at top left will display a hint. Hints are replenished after 10 minutes. - The game is saved each time the pause button is pressed. ※The creatures in the game have been stylized for uniformity, so their color and shape may differ from the real thing.
不思議コレクション 大人の図鑑
Collect replica items from a museum curated by Medjed, covering history, art, science, and nature. Complete your "Adult Encyclopedia" with detailed descriptions of your collected items. This is a completely free game with no in-app purchases.
- Collect replica items
- Complete an adult encyclopedia
- Museum-themed collection
- Detailed item descriptions
- Completely free to play
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メジェドさんが館長をつとめる博物館。ここでは世界の様々な歴史や芸術、科学技術、自然などに関する資料が収集・保管・研究・展示されています。 お土産コーナーの一角に、それら「レプリカ?!」の入ったガチャガチャがあります。コインを手に入れたあなたは、このガチャガチャを回す事ができます。これら景品を集めて、詳細な説明入りの「大人の図鑑」を完成させましょう。 アプリ内課金の無い完全無料ゲームアプリです。 ライセンス:カミオジャパン、いたのくまんぼう アプリ提供:アーツプラネット カミオジャパン https://twitter.com/kamiojapan いたのくまんぼう https://twitter.com/Ninebonz アーツプラネット https://twitter.com/Artsplanet_Inc
Screenshots
Verdict
The clearest difference is review sentiment: 不思議コレクション 大人の図鑑 at 100% against Mysterious Creatures's 0%. 不思議コレクション 大人の図鑑 also leads on rating (5.0 vs 3.4). On price, ratings volume, update cadence and ads there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
不思議コレクション 大人の図鑑 holds the better App Store score, 5.0 against 3.4. Both are backed by a comparable volume of ratings — 5 and 4 respectively. Written reviews point the same way: 0% of Mysterious Creatures's written reviews are positive against 100% of 不思議コレクション 大人の図鑑's.
Mysterious Creatures ships an update every 4 months, 不思議コレクション 大人の図鑑 every 3 months. The most recent releases landed on September 11, 2026 and September 6, 2026 respectively.
| Parameter | Mysterious Creatures | 不思議コレクション 大人の図鑑 |
|---|---|---|
| Price | Free | Free |
| Rating | 3.4 (5 ratings) | 5.0 (4 ratings) — better |
| Positive reviews | 0.0% of reviews | 100.0% of reviews — better |
| Number of ratings | 5 — better | 4 |
| Update frequency | Every 4 months | Every 3 months — better |
| Ads | Yes | Yes |
| In-app purchases | No | No |
| Monetization | Ad-supported | Ad-supported |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 13.0 | 12.0 — better |
| Further details — not scored | ||
| Size | 13 MB | 141 MB |
| Age rating | 4+ | 4+ |
| Developer | Masakazu Yonehara | ArtsPlanet |
Customer experience
Mysterious Creatures
不思議コレクション 大人の図鑑
In-app purchases
Mysterious Creatures
No in-app purchases
不思議コレクション 大人の図鑑
No in-app purchases





