이랏샤이

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About this app

"Is it really okay to use this phrase?"

The anxiety that lingers the longest while learning Japanese is not grammar, but this.

There is a moment when the other person's expression subtly changes when you actually use the honorifics you learned in textbooks.

"Irasshai" is a game that lets you experience that moment in advance.

■ You learn by running a shop

You start at a food stall. When a customer enters, you greet them, take their order, and guide them to a seat. Each time, you choose how to speak.

The shop expands to a cafe, department store, and hotel, and you pass through eight different locations, including a company, answering phone calls, emails, and apologies. As you progress, the required level of formality increases.

■ Uchi and Soto — The core of this app

The correct answer to the same phrase changes depending on the person you are speaking to.

"The manager is away from his desk" is correct within the company, but incorrect when speaking to a client over the phone. This is because you humble yourself before people outside your company, no matter how high-ranking they are. This is the point where it deviates most significantly from the sensibility of the Korean language.

The rings at the character's feet indicate the relationship. A blue ring represents "our side" (内), and a red ring represents "outsiders" (外). If you develop the habit of looking at the rings first to choose an answer, you will find yourself thinking "which side this person is on" first, even in real-life situations.

■ Explains the Reason for the Error

If you choose an incorrect answer, it explains in Korean what is wrong and why.

Whether it involves double honorifics, swapping honorifics and humble language, or ignoring the internal-outside relationship—each error is assigned a type, and as the records accumulate, it shows you where you keep making mistakes.

■ Customer Mode

Once you pass the chapter, you can enter the same shop as a customer. This time, you listen to the clerk and pinpoint where things sound awkward.

Speaking and understanding are different skills. In reality, when working in Japan, knowing whether the other person is speaking politely is just as necessary as not making mistakes yourself.

■ For Those Who

· Those preparing for employment or a working holiday in Japan

· Those working in Japanese companies who lack confidence in honorifics

· Those who have passed the JLPT but find actual conversation difficult

· Those preparing for customer service part-time jobs

■ About This App

· No keyboard is displayed. All input is done via tap, allowing for one-handed use.

· No internet connection is required. It works on subways and airplanes.

· No information is collected. There is no registration or login required.

· No advertisements. No in-app purchases.

■ Question Criteria

It was created based on the "Guidelines for Honorifics" issued by the Japanese Language Subcommittee of the Council on Cultural Affairs of the Agency for Cultural Affairs.

These are the official guidelines for honorifics announced by the Japanese government.

It was not created solely based on textbooks. The creator lived in Japan for 10 years, working at NHK and an airline, and the questions were based on actual mistakes made during that time.

Expressions that differ by region or company are not labeled as "incorrect" but are noted as such. This is because if words widely used in Western Japan, such as "orareru," are listed as incorrect answers, it becomes incorrect information rather than learning.
From street food stalls to hotels and offices, you learn honorifics in eight different settings. Using only tabs without opening the keyboard, the reason why each incorrect answer is wrong is explained in Korean.
Updated on
Aug 21, 2026

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About the developer
진희성
flutterkage2k@gmail.com
양곡1로68번길 59 108동 804호 김포시, 경기도 10057 South Korea

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