Lands of Jail 建物優先度ガイド 2026: What to アップグレード First

Why 建物優先度 Matters

In Lands of Jail, your 建物アップグレード order determines how fast your account progresses. アップグレード the wrong 建物s first, and you'll find yourself stuck — unable to train 部隊, defend your 拠点, or participate in イベント.

This ガイド provides a definitive 優先度 order for all 建物s, tailored for both new and mid-game players.

Core 建物 Categories

Every 建物 in Lands of Jail falls into one of these categories:

Category	建物	Purpose
Command	Warden's Office (HQ)	Unlocks features, sets level caps
経済	Mess Hall, Workshop, Laundry, Warehouse	Produces and protects 資源
Military	Guard Barracks, Sniper Tower, ラリー Point	Trains and commands 部隊
研究	研究 Lab, Library	Provides permanent stat ボーナス
サポート	Infirmary, Embassy, Training Yard	Healing, alliance, 部隊アップグレード
防衛	Walls, Traps, Turrets	Protects your 拠点 from raids

アップグレード優先度 Tier List

🔴 優先度 1: Always Keep Maxed

建物	Reason
Warden's Office (HQ)	Gates all other 建物 level caps. Always アップグレード as soon as possible.
Warehouse	Protects 資源. Higher level = more protected 資源 = less lost to raids.

🟠 優先度 2: High 優先度

建物	Reason
Mess Hall	Food 生産 sustains your army. No food = no 部隊.
研究 Lab	Permanent ボーナス compound over time. Start early.
Guard Barracks	Trains your basic 部隊. Higher level = better 部隊.
Infirmary	Heals wounded 部隊. Higher level = more healed = fewer losses.

🟡 優先度 3: Medium 優先度

建物	Reason
Workshop	Materials for 建設. Important but can lag slightly.
Cell Blocks	囚人 housing. アップグレード when you need more capacity.
Sniper Tower	Ranged 部隊訓練 + 拠点防衛.
Embassy	Alliance features. アップグレード when joining/moving alliances.
Training Yard	部隊 tier アップグレード. Important for mid-game power spikes.

🟢 優先度 4: アップグレード When Convenient

建物	Reason
Laundry	Cash 生産. Useful but not critical early.
ラリー Point	3月 capacity. アップグレード when you need more simultaneous marches.
Walls	拠点防衛. Important if you're being 攻撃ed frequently.
Trap Workshop	Defensive traps. Low 優先度 unless you're a 防衛-focused player.

Detailed 建物 Analysis

Warden's Office (HQ)

The Warden's Office is your account's power core. Its level determines:

Maximum level of all other 建物s
Which features are unlocked
Your overall 拠点 power rating
Available tech tree nodes

アップグレード戦略: Start every アップグレード session by checking if you can アップグレード your HQ. If yes, do it first. Your HQ should always be the highest-level 建物 in your 拠点.

HQ Level	Unlocks	Recommended Day
1-5	Basic 建物s, チュートリアル	Day 1
6-10	Alliance features, 2nd march	Day 2-3
11-15	Advanced 部隊, 3rd march	Day 4-7
16-20	Tier 2 部隊, advanced 研究	Day 8-14
21-25	Tier 3 部隊, alliance war	Day 15-30
26+	End-game content	Day 30+

Mess Hall (Food Production)

Food is the most critical resource because it feeds your 部隊. Without sufficient food, your army starves and you can't train new units.

Key Tips:

アップグレード Mess Hall evenly with your HQ for the first 15 levels
Assign 経済-focused 囚人 to boost 生産
Supplement with world map food 収集
Build multiple Mess Halls if the game allows it

Warehouse

The Warehouse is your insurance policy. 資源 beyond the protected limit are lootable by 攻撃ers.

Warehouse Level	Protected 資源	Notes
1	50K each	Bare minimum
5	200K each	Early game safe
10	500K each	Mid-game target
15	1M each	Late game
20+	2M+ each	End game

研究 Lab

研究 provides permanent account-wide ボーナス. The earlier you invest in 研究, the more total benefit you receive over your account's lifetime.

Recommended 研究 Path:

経済 Branch → 資源生産 +20-50%
Military Branch → 部隊攻撃/HP +10-30%
防衛 Branch → Wall HP, trap ダメージ
サポート Branch → 3月 capacity, 回復速度

Infirmary

Wounded 部隊 that can't fit in the Infirmary are permanently lost. This makes the Infirmary one of your most cost-effective 建物s — 回復 is cheaper than 訓練 new 部隊.

Pro Tip: Before any major バトル or alliance war, アップグレード your Infirmary to maximum capacity. The 資源 spent on the アップグレード are less than what you'd lose from unrecoverable casualties.

Optimal Build Order (Step by Step)

Phase 1: Foundation (HQ Level 1-10)

2. Mess Hall → Match HQ level
3. Warehouse → Match HQ level
4. 研究 Lab → HQ level - 1
5. Guard Barracks → HQ level - 1
6. Workshop → HQ level - 2
7. Infirmary → HQ level - 1
8. Cell Block → HQ level - 2

Phase 2: Military Development (HQ Level 11-20)

2. 研究 Lab → 18
3. Guard Barracks → 18
4. Sniper Tower → 18
5. Infirmary → 18
6. Mess Hall → 17
7. Warehouse → 17
8. Training Yard → 16
9. Workshop → 15
10. Embassy → 15

Phase 3: Endgame Preparation (HQ Level 21+)

2. All Military 建物 → 22+
3. 研究 Lab → 22+
4. Infirmary → 22+
5. Warehouse → 20+
6. All 経済 建物 → 20+
7. 防衛 建物 → 18+
8. サポート 建物 → 18+

拠点 Layout Tips

While Lands of Jail has some flexibility in 建物 placement, following these principles will make your 拠点 harder to raid:

Placement Principles

HQ in the center — hardest to reach, best protected
経済建物s around HQ — walls protect them
Military 建物s on the outer ring — they can rebuild quickly
Walls encircling critical 建物s — force 攻撃ers through kill zones
Traps near entry points — maximize trap exposure

防衛 Layout Example

│  [Wall]          [Wall]      │
│  [Trap]  [経済]  [Trap]   │
│  [Mil]  ┌───────┐   [Mil]   │
│  [Sup]  │  HQ   │   [Sup]   │
│  [Mil]  └───────┘   [Mil]   │
│  [Trap]  [経済]  [Trap]   │
│  [Wall]  [Gate]  [Wall]      │
└─────────────────────────────┘

Key Tips

Don't spread walls too thin — it's better to fully enclose a smaller area
アップグレード walls in batches, not one at a time
Sniper Towers and Turrets should cover approach paths
Keep your most important 建物s as far from the border as possible

アップグレード Cost Reference

Note: Exact numbers will be updated with in-game data. The table below shows the general cost progression pattern.

Typical アップグレード Cost Pattern

建物 Level	Food Cost	Material Cost	Time	Cash Cost
1 → 2	1,000	500	1 min	100
5 → 6	15,000	8,000	30 min	2,000
10 → 11	80,000	40,000	4 hours	12,000
15 → 16	300,000	150,000	12 hours	50,000
20 → 21	1,000,000	500,000	1 day	200,000
25 → 26	3,000,000	1,500,000	3 days	600,000

Cost-Saving Tips

Use 速度-ups strategically: Save them for HQ levels that take 12+ hours
Alliance Help: Always request help for アップグレード — it reduces time
イベント timing: Many イベント boost build 速度 or reduce cost — time your アップグレード accordingly
VIP/Pass ボーナス: If you have a pass, utilize its build 速度ボーナス

よくある質問（FAQ）

Should I アップグレード my HQ even if my other 建物s aren't maxed?

Yes. Your HQ gates everything. Always push it to the next level as soon as 資源 allow. Other 建物s can catch up afterward.

How many resource 建物s should I have?

Aim for at least 2-3 of each resource type. The exact number depends on your playstyle — military-focused players need more Food, 経済-focused players benefit from a balanced spread.

Is it worth spending gems on 建物速度-ups?

Geneラリー no. Save gems for 囚人 summons. The exception is during competitive イベント where build 速度 gives ranking 報酬.

What happens if my HQ is destroyed in an 攻撃?

Your HQ being destroyed means you lose the 防衛バトル, but it doesn't permanently destroy the 建物. Your 建物s auto-repair after each 攻撃.

Can I rearrange my 建物s later?

Yes, Lands of Jail allows 建物 rearrangement. You can redesign your 拠点 layout at any time without cost.

Should I build walls first or アップグレード建物s first?

Both are important, but prioritize 建物s first. Walls are 防衛; 建物s are progression. If you can't progress because you spent everything on walls, you've prioritized wrong.

How do I get more builders?

Most SLG games start you with one builder. Additional builders are typically available through:

VIP/Premium pass
Gem purchase (one-time)
イベント報酬

Check the in-game shop for current availability.

Last 更新日： 7月 2026 | アップグレード costs and exact numbers will be refined as game data is verified.

Why 建物 優先度 Matters

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