Yen

Yen (Symbol: ¥) is a currency most commonly used in the Persona series.
==History==
 is the official currency of Japan. It is the third most traded currency in the foreign exchange market, behind the and the .
==Appearances==
*Shin Megami Tensei
*Shin Megami Tensei: Devil Summoner
*Devil Summoner: Soul Hackers
*Soul Hackers 2
*Megami Ibunroku Persona
*Persona 2: Innocent Sin
*Persona 2: Eternal Punishment
*Persona 3 / FES / Portable / Reload
*Persona 4 / Golden
*Persona 5 / Royal
*Persona 5 Strikers
*Persona Q: Shadow of the Labyrinth
*Persona Q2: New Cinema Labyrinth
==Profile==
Yen can be used for buying items and equipment from vendors. In games that feature negotiation mechanics, it's possible to use money to pay enemies and/or demand money from them. In most games, the maximum amount of money that can be carried is ¥9,999,999 and the most common way to obtain yen is by defeating enemies in battle and/or selling materials dropped by them.
In the PlayStation and Nintendo 3DS versions of Devil Summoner: Soul Hackers, as well as the early Persona games, yen can be used to purchase casino coins.
In later games of the Persona series, yen is also used to buy Personas from the compendium and discounts are granted for having registered a certain quantity of Personas. In those games, it's also possible to attend part-time jobs to obtain money.
===Shin Megami Tensei===
Yen is the currency used during the first part of the game. After the events of the Great Cataclysm, Tokyo starts using macca instead, rendering yen obsolete.
===Shin Megami Tensei: Devil Summoner===
Yen can be traded for Magnetite and vice versa at the Organic Energy Association in Yarai-Ginza, at varying rates.
===Devil Summoner: Soul Hackers===
Yen can be traded for Magnetite and vice versa at the Organic Energy Association at the Shibahama Core, at varying rates.
===Soul Hackers 2===
Yen is the primary currency of the game and is required for trading, and it can also be used in negotiating with demons and obtaining key items in some requests.
===Megami Ibunroku Persona===
The protagonist can pay Mariko Yabe 5,000 yen in Thanatos Tower to receive a Mirror Shard.
===Persona 2 duology===
The Hula of Misfortune spell, which can only be used by certain enemies, will halve the protagonist's money. Yen is also required to spread rumors at the Kuzunoha Detective Agency.
===Persona 3 / FES / Portable===
In order to start the Devil Social Link, the protagonist must first pay a total of ¥40,000 to President Tanaka. This also applies to the female protagonist in Persona 3 Portable.
During Shuffle Time, choosing a coin card will also grant money to the protagonist.
===Persona 4 / Golden===
The Confusion / Panic status effect gives the inflicted enemy a chance to throw away some of their money and give them to the other team. This is beneficial for the protagonist if an enemy is afflicted. However, if a party member is afflicted with that status effect, they'll be throwing away the protagonist's money instead. In addition, the skill Pulinpa has a 40% chance of confusing a foe, but one way it can backfire is by wasting 3% of the protagonist's money.
===Persona 5 / Royal===
Yen is necessary to pay train fees to move around Tokyo, and certain activities require payment to enter each time. Money is involved in some Confidants as well, as the protagonist has to pay ¥100,000 to unlock Chihaya Mifune's Confidant, and ¥5,000 for each call towards Sadayo Kawakami, necessary for boosting her Confidant. On the other hand, by ranking up Munehisa Iwai to Rank 5 and Tae Takemi to Rank 7, the protagonist will earn a discount at their respective shops, Untouchable and Takemi Medical Clinic.
In battle, the Confuse status effect, similar to Persona 4, can be useful when taking on Mementos Requests. Not only are most of those bosses not immune to being confused, they won't run away from the battle after a certain amount of turns have passed.
The money payout is linked to the Luck stat, as the higher the protagonist's Luck, the more money they can receive from Confused enemies. The same applies for asking for money in negotiation. 
Several Confidant abilities also boost the money reward in battle: Chihaya Mifune's Rank 3 Confidant ability, Money Reading, allows the protagonist to consult her to double the money reward in battle for that day. Additionally, Hifumi Togo's Rank 7 ability also doubles the reward automatically if the group wins a battle after a successful ambush.
In the Velvet Room, once the protagonist maxes out Caroline & Justine's Confidant, he'll be able to pay for them to create Personas of a higher level.
====Persona 5 Royal====
In Persona 5 Royal, the money reward can be boosted in Mementos via trading Stamps with Jose in his shop. The increase can go as high as x2 the normal amount.
The skill Money Boost grants the party 15% more money after victory. It can only be obtained by equipping the SEES Armband, available in the Persona 3 Costume DLC.
===Persona 5 Strikers===
The protagonist starts out with ¥5,000 at the beginning of the game.
Yen can be obtained by defeating shadows and by completing requests that reward the protagonist money. More money will drop the protagonist's Luck stat becomes.
The protagonist can level up his BOND which some unlocks skills, such as Extortionist, that will increases the money gained after defeating Shadows. Smart Shopper is another BOND skill that helps the protagonist in saving money from Sophia's Shop.