Islands and Quests List – High Sea Saga

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Published on 24 April 2026

There are 7 countries available in High Sea Saga with total 39 islands. Those countries and islands will not be available all at once from the beginning; they will be revealed to you as you progress in the game.

Here is the complete list of those countries and islands that you can conquer in High Sea Saga:

Note: In the "Repeatable Quest (∞)" column, the numbers inside the parentheses are the Stamina required on normal days. On Monday, the quests will need less Stamina.

Euripitan Union

Euripitan Union is also known in other language as ユーリピアン共和国 (Japanese) and ยูริเปิยน ยูเนี่ยน (Thai).

Enemy Strength LevelEnemy FrequencyIsland NameName in Other LanguageTotal QuestsRepeatable Quest (∞)
1RareNeighbor Islandごきんじょ島4
  • E+ Rank Hidden Intro Quest (15)
  • F+ Rank Beginner Quest (2)
2SomeShabby Islandくたびれ島5
  • E++ Rank Hidden Medium Quest (16)
  • F++ Rank Hidden Novice Quest (11)
  • F+ Rank Beginner Quest (2)
6ManyBusiness Islandしょーばい島5
  • E+++ Rank Hidden Medium Quest (17)
  • F+++ Rank Hidden Intro Quest (13)
8RareCheery Islandにぎやか島5
  • E+++ Rank Hidden Veteran Quest (19)
  • E Rank Hidden Intro Quest (15)
  • F++ Rank Novice Quest (2)
8RareSandy Island砂の島4
  • E+++ Rank Hidden Veteran Quest (20)
12SomeToasty Islandあったか島5
  • D Rank Hidden Veteran Quest (20)
  • E+ Rank Hidden Intro Quest (13)
12SomeTropical Islandナンゴク島5
  • D+ Rank Hidden Veteran Quest (22)
  • E++ Rank Hidden Medium Quest (15)
15ManyLake Islandミズウミ半島5
  • D+ Rank Hidden Veteran Quest (22)
  • E+++ Rank Hidden Medium Quest (15)
25ManyBig Islandタイコク島4
  • D++ Rank Hidden Veteran Quest (24)
  • E+++ Rank Medium Quest (12)
25ManyDev Islandとじょう島5
  • D+ Rank Hidden Veteran Quest (23)
  • E+++ Rank Hidden Medium Quest (16)
50SomeBright Islandほがらか島5
  • D++ Rank Hidden Veteran Quest (23)
  • E+++ Rank Veteran Quest (12)
50SomeChilly Islandさむい大陸5
  • D++ Rank Hidden Veteran Quest (25)
  • D+ Rank Hidden Veteran Quest (16)
50SomeFrigid Islandごっかん島6
  • D+++ Rank Hidden Expert Quest (26)
  • D++ Rank Hidden Veteran Quest (21)
75ManyMystery Islandふしぎ島6
  • C Rank Hidden Expert Quest (26)
  • D+++ Rank Hidden Veteran Quest (18)
  • D++ Rank Veteran Quest (8)
75ManyPlacid Islandおっとり島5
  • D++ Rank Hidden Veteran Quest (22)

Armonica

Armonica is also known in other language as アリモニカ大陸 (Japanese).

Enemy Strength LevelEnemy FrequencyIsland NameName in Other LanguageTotal QuestsRepeatable Quest (∞)
16ManyWarm Islandほっこり島4
  • D Rank Hidden Veteran Quest (18)
18SomeBirdy Islandことりの島4
  • D+ Rank Hidden Veteran Quest (24)
22RarePressing Islandせまーる島4
  • D Rank Hidden Veteran Quest (20)
  • E Rank Intro Quest (8)
28ManyCalm Islandやすらぎ島4
  • D+ Rank Hidden Veteran Quest (25)
  • E+++ Rank Medium Quest (8)
40SomeShort-Sleeve Islandはんそで島4
  • D++ Rank Hidden Veteran Quest (21)
55RareSmile Islandにっこり島4
  • D++ Rank Hidden Veteran Quest (26)
  • D Rank Veteran Quest (10)
64ManyFrozen Islandげきさむい島4
  • D++ Rank Hidden Veteran Quest (26)
  • D+ Rank Veteran Quest (10)
64ManyMinus Islandまいなす島5
  • D++ Rank Hidden Veteran Quest (25)
  • D++ Rank Veteran Quest (10)
95ManyBright Kingdomほがらか大国4
  • C Rank Hidden Expert Quest (29)
  • D+ Rank Veteran Quest (10)
95ManyComfort Islandのんびり島4
  • D++ Rank Hidden Veteran Quest (28)
  • D+ Rank Veteran Quest (8)

Meripito

Meripito is also known in other language as メリティポー王国 (Japanese).

Enemy Strength LevelEnemy FrequencyIsland NameName in Other LanguageTotal QuestsRepeatable Quest (∞)
78SomeSleepy Islandオヤスーミ島5
  • C+ Rank Hidden Expert Quest (30)
  • D+ Rank Veteran Quest (10)
88ManyForgetful Islandウッカーリ島5
  • C+ Rank Hidden Fierce Quest (33)
  • D++ Rank Veteran Quest (10)
125RareTired Islandオッツカレ島5
  • C+++ Rank Hidden Supreme Quest (32)
  • C Rank Expert Quest (12)
165SomeMellow Islandホンノーリ島5
  • C+++ Rank Hidden Supreme Quest (32)
  • D++ Rank Veteran Quest (12)

Umadbro Islands

Umadbro Islands is also known in other language as 東南エンド諸島 (Japanese).

Enemy Strength LevelEnemy FrequencyIsland NameName in Other LanguageTotal QuestsRepeatable Quest (∞)
92SomeForest Park森林パーク3
  • C+++ Rank Hidden Supreme Quest (36)
115ManyUnexplored Island秘境アイランド4
  • B+ Rank Hidden Supreme Quest (45)
  • D+++ Rank Hidden Expert Quest (23)
210ManyHeavy Islandおもたい島2
  • B+++ Rank Hidden Rare Quest (50)

Treelania

Treelania is also known in other language as ナンデーイ大陸 (Japanese).

Enemy Strength LevelEnemy FrequencyIsland NameName in Other LanguageTotal QuestsRepeatable Quest (∞)
145SomeGotcha Islandマルワカーリ島5
  • B Rank Hidden Supreme Quest (34)
  • C+ Rank Expert Quest (14)
218ManySecluded Islandオクマッタ島5
  • B+++ Rank Hidden Rare Quest (40)
  • C++ Rank Fierce Quest (14)
232SomeChomper Islandヨクタベール島5
  • B+ Rank Hidden Supreme Quest (32)
  • C+ Rank Expert Quest (12)

Pirate Seas

Pirate Seas is also known in other language as 大海賊地帯 (Japanese).

Enemy Strength LevelEnemy FrequencyIsland NameName in Other LanguageTotal QuestsRepeatable Quest (∞)
220ManyTottori Islandとっとり島3
  • B+++ Rank Hidden Rare Quest (50)
270ManyCraggy Islandゴツゴツ島6
  • S Rank Hidden Ultimate Quest (50)
  • B+++ Rank Rare Quest (26)
350ManyFaint Islandほのか島3
  • A++ Rank Hidden Legend Quest (50)

Kairo Islands

Kairo Islands is also known in other language as カイロ諸島 (Japanese).

Enemy Strength LevelEnemy FrequencyIsland NameName in Other LanguageTotal QuestsRepeatable Quest (∞)
450SomeKairo Islandかいろ島14None
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