Jakku Song, a Chinese content creator and YouTuber known for his bold, often crude Japanese-language comedy skits, has gained massive attention for his highly unconventional method of learning Japanese.
The native Mandarin speaker from China openly claims that he achieved strong Japanese proficiency, enough to pass the JLPT N2 exam, primarily through extreme immersion in Japanese adult videos (JAV), without ever attending any formal classes, using textbooks, or hiring tutors.
In his viral YouTube video titled "The result of learning Japanese only through A◯", which he uploaded around December 2024, Jakku Song directly shares his story in a mix of Japanese and auto-dubbed elements. He states that he watched a total of 4,545 Japanese adult videos throughout his life.
What started as casual viewing gradually turned into serious language absorption: he paid close attention to pronunciation, tone, vocabulary, grammar patterns, slang, and natural conversational expressions used in the dialogues.
On his Instagram account, Jakku Song embraces an eccentric and provocative persona.
He describes himself with playful yet explicit titles like アジア最後の紳士 (Asia's last gentleman), 普通の中国人 18cm (just a regular Chinese guy, 18cm), "Prince of dirty jokes," and 官能詩人 (erotic poet). He humorously credits the performers as his "teachers," and even thanks specific well-known AV actresses such as Sola Aoi, Tsukasa Aoi, Kana Momonogi, and Rei Honjo for their "help" in his linguistic journey.
In the video, he proudly displays his official JLPT N2 certificate, noting that he scored very well, nearly perfect in some sections, and declares N2に合格しました！！ みんなのおかげです (I passed N2!! Thanks to everyone).
As a man living in China watching that volume of content (roughly one video per day if spread over ~12 years), Jakku Song most likely sourced most of the adult videos online through typical internet channels common for accessing adult content, like free streaming sites, download platforms, torrents, and various JAV-specialized websites that were readily available during his years of viewing.
He never mentions paying for official subscriptions or physical DVDs in his storytelling.
Instead, it appears to be the standard mix of free online resources that many young men in China and elsewhere used to consume JAV privately at home or on personal devices over time.
As a YouTuber, Jakku Song frequently uploads a blend of videos: the famous language-learning reveal (where he lies dramatically in a sea of "used" tissues for comedic effect before showing his certificate), short comedy skits performed entirely in Japanese (such as shouting explicit phrases like 俺はおちんちんが大好きなんだよ I really love dick in public spaces in China), announcements, and personal stories.
Many of his clips involve absurd, filthy humor, including public disturbances or over-the-top dirty jokes, all delivered fluently in Japanese.
In other words, his profile and posts mix Japanese, Chinese, and English, often featuring crude humor, public outbursts, and self-deprecating jokes about masturbation, sex, and daily life.
He frequently posts in Japanese, interacts with Japanese followers, and maintains the “I love everyone” vibe while producing content that would be considered heavy or 重口味 (strong-flavored) in China.
Jakku Song's approach highlights the power of massive, passionate immersion for listening and speaking skills.
But for him, he had the advantage and the benefits of his proficient Mandarin, and his shared kanji knowledge between Chinese and Japanese. This certainly helped him with reading and vocabulary recognition.
He has said he realized one day that he could understand and speak Japanese naturally after all those hours of exposure. That confidence led him to take the JLPT N2 exam on a whim, which he passed.
That being said, many in language-learning communities point out that while heavy consumption of adult videos can dramatically boost listening comprehension, colloquial speech, and slang, it likely provided limited practice in formal writing, polite keigo, academic reading, or structured grammar needed for a full N2 pass.
Observers suspect he probably did some supplementary self-study for the reading and kanji sections, even if he downplays it for comedic effect.
Still, his dedication to raw, repeated exposure is undeniable and has sparked lively debates about unconventional language acquisition.
The JLPT N2 is an upper-intermediate level of the Japanese-Language Proficiency Test that certifies the ability to understand Japanese used in everyday situations as well as in a variety of contexts.
To pass the exam, candidates must meet two strict conditions: achieve an overall score of at least 90 out of 180 points, and score at least 19 out of 60 points in each of the three sections. These sections are Language Knowledge (Vocabulary and Grammar), Reading, and Listening. You cannot compensate for a weak section with a strong performance in another.
Ffailing to reach the minimum in any one section results in an automatic fail, regardless of their total score. The entire test lasts approximately 155 minutes.
In terms of knowledge requirements, N2 typically demands recognition of around 1,000 kanji, a vocabulary of about 6,000 words, and mastery of roughly 195 to 200 grammar patterns.
These figures are cumulative, building on everything from lower levels with added complexity in nuance, formal expressions, and contextual usage.
The exam evaluates not only literal meaning but also the ability to grasp tone, speaker intent, logical flow, and implied information across longer reading passages and natural-speed conversations.
Most learners who have already passed N3 need between 600 and 900 additional hours of focused study to reach a comfortable passing level for N2, though this varies widely depending on individual background and immersion.
The average pass rate for N2 hovers around 35%, making it noticeably more challenging than lower levels.
In the context of Jakku Song's story, his heavy immersion in Japanese adult videos likely provided a strong boost to listening comprehension, colloquial speech, and slang, but the exam’s demands in reading comprehension, formal grammar patterns, and written kanji usage often require supplementary targeted practice beyond pure media consumption.
Overall, the JLPT N2 remains one of the most widely recognized benchmarks for practical Japanese ability and is commonly accepted by universities and employers in Japan.