One of the best ways to get stronger inLike a Dragon: Infinite Wealthis to take on the dungeons and their bosses available in each city. One of these dungeons in Yokohama, the Yokohama Underground, allows you to train your party while earning some handy crafting resources and job-specific equipment.

You will challenge some tough opponents in each location, with even some of the mini-bosses posing unique challenges and significant threats, no matter your level. The good news is that there are plenty of unique rewards that exist for those willing to face the hordes waiting below the surface.

A screenshot from Like a Dragon: Infinite Wealth showing the floor map at the start of Yokohama Underground Sector 2, showing five hostages left to be rescued

Yokohama Underground Structure

As with the Hawaiian Haunt dungeon,Yokohama Underground is split into three sectorsof increasing intensity.

The more intense remixed’Ex Sector' floors 30 through 40 become availableonce youdefeat the dungeon’s level 30 boss.

A screenshot from Like a Dragon: Infinite Wealth showing the UI pop-up for “Geomijul’s Survey Data x175,” with a subtitle that reads “Data that the Geomijul’s team dropped. Can be exchanged for rewards. Current stock: 35,540

Each sector hasa midpoint mini-boss and a final boss, allowing you tounlock new travel checkpointsonce defeated.

Jo Amon

Three ‘Amon’ Ultimate Assassins

Many ofthe enemies in the Yokohama Underground dungeon can spawn backup, with the ‘Death’s-hed’ and ‘Metal Headsman’ being standout examples.

This culminates with the Ex Sector’s final boss, Jo Amon, who willimmediately spawn three similar assassinswith varying weaknesses.

When you get Jo Amon to half health, he willimmediately spawn any of the three assassinsyou’ve taken out, also at half health, anddo a combo attack.

It’s important to try andtake out enemies as fast as possible in the Yokohama Undergroundor you risk going through waves of the same enemies in an endless loop. A key to this isrecognizing the weaknesses and remembering themthroughout the dungeon.

Later sections are great opportunities to grind for money, especially as you get to a higher level and can progress through the battles automatically.

There isa lot of loot to be found in Yokohama Underground, be it actualweapons or the crafting materialsyou’ll find lying around.

When you enter a hallway or room with an item, Kiryu orsomeone in the party will call out that an item can be foundnearby. Every time.

Much of the following loot can be found as shiny objects on the ground, in containers, or picked off enemies.

32 or more

2000 or more

Consumables, Stacks of multiple Geodes, Tier 4 Weapons and Gear, Keys

37 or more

3000 or more

Consumables, Stacks of multiple Geodes, Job Manuals, Tier 5 Weapons and Gear, Keys

44 or more

4000 or more

Consumables, Crystals, Tier 7 Gear for Specific Jobs, Job Manuals, Keys

52 or more

6000 or more

Consumables, Stacks of multiple Crystals, Tier 7 Gear for specific Jobs, Keys

Sacred Leather Socks

Squid Tentacles

In addition to the actual materials and equipment, you’ll alsofind Geomijul Data lying aroundthat can beredeemed at the dungeon entrance with Utamaru.

Yokohama Underground Item Exchange List

While exploring the dungeon, you’ll occasionally come acrossshiny objects on the groundthat are revealed to beGeomijul’s Survey Data. When you’ve left the dungeon and spoken to Utamaru, you canexchange the data for new itemsand resources.

Due to the ease at which you can earn Geomijul Data in later sectors, this isa great way to get specific crafting resources.

Most ofthe crafting resources are affordable, with the items only going up in cost from there.

10

50

250

Empty Cough Drop Tin

A tin that once held Asame Ade cough drops. There’s nothing inside now, but it could be used to enhance weapons.

2,000

Tennis Ace’s Racket

Like a polished gem in the rough. A tennis racket with endless possibilities.

3,000

Safe Key

A key that lets you open a safe or container that’s locked.

1,000

Phantasy Star Online 2: New Genesis Soundtrack CD 1

CD featuring the track “A World Beyond the Sky” from the game Phantasy Star Online 2: New Genesis.

160

Phantasy Star Online 2: New Genesis Soundtrack CD 2

CD featuring the track “Song of War: Against Fate” from the game Phantasy Star Online 2: New Genesis.

Phantasy Star Online 2: New Genesis Soundtrack CD 3

CD featuring the track “Song of Mourning: The Eternal Wind” from the game Phantasy Star Online 2: New Genesis.

Material that can be used to create weapons.

18,000

Thanks to the range of currency you’ll find in the Yokohama Underground dungeon,you should have no problem affording the resources and weapon upgradesto get ahead of any challenge.