Official Announcement: Manga English Extensive Reading App 'Langaku' Launches for Educational Institutions
Mantra Inc. has officially launched its manga-based English reading app 'Langaku' for educational institutions, demonstrating significant increases in student study time through a Tokyo high school trial.
📋 Article Processing Timeline
- 📰 Published: April 9, 2026 at 00:00
- 🔍 Collected: April 8, 2026 at 15:30
- 🤖 AI Analyzed: April 20, 2026 at 14:43 (287h 12m after Collected)
Mantra Inc. (Headquarters: Bunkyo-ku, Tokyo; Representative Director: Shonosuke Ishiwatari), operator of the manga-based English extensive reading app 'Langaku,' is pleased to announce the official launch of its introduction to educational institutions, along with the opening of a dedicated contact window for educational institutions and educators.
'Langaku' is an app that aims to naturally build an 'English brain' by engaging users in extensive English reading through fun manga. Starting from the premise 'Continuity through Fun,' it helps to make English learning a habit, supporting the natural improvement of reading comprehension and vocabulary.
'Extensive English reading,' known as an effective learning method to accustom the brain to English, was also recommended by the famous Japanese author Soseki Natsume, who was once an English teacher.
"Youth studying English, once they have reached a certain level, should read plenty of English books indiscriminately without consulting a dictionary. Even if there are parts you don't fully understand, skip them and keep reading steadily, and eventually you will come to understand... In short, those learning English should do it through natural habit, just as a Japanese person learns their native language." (p.23)
*Reference: Yuki Kawashima (2000) 'English Teacher Soseki Natsume', Shincho Sensho
Through the accessible medium of manga, Langaku provides an 'effortless and sustainable English environment' for both schools and homes.
With this announcement, we are publishing the case study and effectiveness verification results of Langaku's implementation at a metropolitan high school in Tokyo.
**■ Trial Implementation at a Metropolitan High School: Confirming the Learning Effects of Extensive English Reading**
In this initiative, all second-year students at a metropolitan high school in Tokyo utilized 'Langaku' to practice extensive English reading.
As a result, an average of 32,000 words (up to 332,000 words) and 9.4 hours (up to 114 hours) of self-study (extensive English reading) was achieved over 150 days.
*Reference: The word count of a textbook for 6 years of junior and senior high school is about 30,000 to 50,000 words; one novel is about 70,000 words.
In this survey (targeting 272 students), it was confirmed that habits of naturally engaging with English in daily life were formed, addressing challenges such as 'inability to continue English' and 'failure to establish learning habits at home.'
## ■ Key Survey Results
After the introduction of Langaku, a significant change was observed in how students interacted with English. Actions of engaging with English in daily life, especially during 'commuting' and 'free time,' have taken root.
**● Increase in Time Spent with English**
- 90.1% of students who used it 3 or more times a week answered that 'time spent interacting with English increased.'
- 72.8% of all users felt an increase in their English engagement time.
'Langaku' is an app that aims to naturally build an 'English brain' by engaging users in extensive English reading through fun manga. Starting from the premise 'Continuity through Fun,' it helps to make English learning a habit, supporting the natural improvement of reading comprehension and vocabulary.
'Extensive English reading,' known as an effective learning method to accustom the brain to English, was also recommended by the famous Japanese author Soseki Natsume, who was once an English teacher.
"Youth studying English, once they have reached a certain level, should read plenty of English books indiscriminately without consulting a dictionary. Even if there are parts you don't fully understand, skip them and keep reading steadily, and eventually you will come to understand... In short, those learning English should do it through natural habit, just as a Japanese person learns their native language." (p.23)
*Reference: Yuki Kawashima (2000) 'English Teacher Soseki Natsume', Shincho Sensho
Through the accessible medium of manga, Langaku provides an 'effortless and sustainable English environment' for both schools and homes.
With this announcement, we are publishing the case study and effectiveness verification results of Langaku's implementation at a metropolitan high school in Tokyo.
**■ Trial Implementation at a Metropolitan High School: Confirming the Learning Effects of Extensive English Reading**
In this initiative, all second-year students at a metropolitan high school in Tokyo utilized 'Langaku' to practice extensive English reading.
As a result, an average of 32,000 words (up to 332,000 words) and 9.4 hours (up to 114 hours) of self-study (extensive English reading) was achieved over 150 days.
*Reference: The word count of a textbook for 6 years of junior and senior high school is about 30,000 to 50,000 words; one novel is about 70,000 words.
In this survey (targeting 272 students), it was confirmed that habits of naturally engaging with English in daily life were formed, addressing challenges such as 'inability to continue English' and 'failure to establish learning habits at home.'
## ■ Key Survey Results
After the introduction of Langaku, a significant change was observed in how students interacted with English. Actions of engaging with English in daily life, especially during 'commuting' and 'free time,' have taken root.
**● Increase in Time Spent with English**
- 90.1% of students who used it 3 or more times a week answered that 'time spent interacting with English increased.'
- 72.8% of all users felt an increase in their English engagement time.