- Actor Allusion - Saki Fujita is the voice sample provider of the Hatsune Miku software, both in Hatsunia and in real life. Hatsunia's tallest mountain is Mt. Saki.
- The Alliance - In its universe, Hatsunia is part of the Mutual East Asian Cooperation Union, a benevolent and sincere version of the so-called "Greater East Asia Co-Prosperity Sphere" of Imperial Japan. It is also part of the Pacific Rim Organization, which is basically a Pacific version of NATO.
- Arc Number / Goroawase Number - There are a lot of statistical anomalies in Hatsunia involving the number 39. It just so happens that "3-9" can be pronounced "mi-ku" in
JapaneseHatsunese. - Arcology - The growth of Miraito's IT and tourism industries with limited land area have incentivized the construction of the Sky Mile Tower and similar buildings. Later on, the Mega-City Pyramid will be built.
- Artifical Intelligence - Japan lags in AI research while Hatsunia leads.
- Attack Drone - Unmanned fighters are becoming more prominent in Hatsunia's air force.
- Augmented Reality - There are startups with names like Coil and Megamass, developing mixed reality smartglasses (like Microsoft HoloLens).
- Bland Name Product - Some companies have names like Mikubishi or Ongakuten (Rakuten), but others are named after real-life ones (e.g. Crypton Future Media, Toyota), as they have had direct ties with Miku or other Vocaloids.
- Cool Spaceship - There is a reusable launch system and spaceship called Mikumaru, which landed the first Hatsunese people on Mars in 2016.
- Custom Uniform - Like in Japan, high school students wear uniforms, but with more freedom to express their individuality.
- Cute Machines - Hatsunia's robotics industry produces a lot of these. But they also focus on practicality, too.
- Different World, Different Movies - Hatsunia has "Mobile Suit Zaku" (because of the 39 pun), which is basically a Gundam mirror universe.
- Early Installment Weirdness - Hatsunia was originally a "United Federation" (like Star Trek) with a presidential republic, and had only 39 million people.
- Electronic Music - The most popular music in Hatsunia are genres like electropop, techno, trance, and house, all made using synthesizer software (sometimes accompanied with real instruments).
- Everything Is an iPod in the Future - Japanese electronics were mainly leaders in the "Cassette Futurism" era, but were overtaken by Apple and Samsung in the digital age. Hatsunese electronics, on the other hand, are still cutting-edge.
- Fantasy Counterpart Culture - Hatsunia is basically Japan with more Hatsune Miku, a more benevolent modern history, more social progress, and the innovative and tech-savvy spirit of Silicon Valley. The nickname of Hatsunia is "The Land of the First Sound" (i.e. first sounds of the day), paralleling "The Land of the Rising Sun." Yamaha is the developer of the Vocaloid software engine in real life, so there is "Yamaha" instead of "Yamato."
- Fictional Social Network - mixu is like mixi (mikushī), but more successful in its universe.
- Fun With Acronyms - The Mutual East Asian Cooperation Union
- The first satellite of the Hatsunese space agency (HASDA) was the High Altitude Test Satellite Utilizing New Experiments. HASDA also has a Mars probe called MELODY (Mars Exploration with a Lander-Orbiter DYnamic, inspired by the MELOS concept). Human interplanetary missions are part of the "Project DIVA" (Development of Interplanetary Vehicle Architecture) program. - High-Tech Hexagons - Can sometimes be a part of modern Hatsunese aesthetics.
- Hologram - Current Miku concerts are often mistaken for holograms, but are actually projections on a glass screen. However, scientists are researching ways to make actual holograms.
- Japanese Politeness - Hatsunia has this, too, but it is less regimented, thereby preventing things like bullying and anti-LGBT discrimination that result from a notion of "harmony" through strict conformity. "The nail that sticks out gets hammered down" is the proverb that does not exist in Hatsunia.
- Japan Takes Over the World - Hatsunia is inspired by the 1980s notion that Japan would become an economic and technological superpower (also, one of Hatsune Miku's most famous songs is called "(The) World is Mine"), but adapted for the post-80s world of software-focused businesses, where the Japanese tech industry has faltered. Hatsunia also did not go through an economic "miracle" which became an unsustainable bubble followed by stagnation. Japanese corporate culture was thought to be the most efficient in the 1980s, but now is considered to lag behind in productivity, so the Hatsunese economy is intended to actually be efficient.
- Kawaisa - There is a lot of cuteness in Hatsunese pop culture, but there is an emphasis on being "cute and capable" and not just infantile and helpless.
- Mirror Universe - A partial mirror universe in which Hatsunia is a democracy joining the Allies during WWII, while China is a fragile democracy that succumbs to fascism and joins the Axis. After the war, China is split in two.
- Meaningful Name - What's a better symbol for a more tech-savvy and software-focused version of Japan than Hatsune Miku, a singing software character whose name means "the first sound from the future?"
- Never Was This Universe - Hatsunia exists in a parallel universe in which there is a landmass that happens to be shaped like Hatsune Miku's hair instead of Japan. Some countries are different (like China being split into two and Korea being united), but most remain the same.
- No-Paper Future - Hatsunese offices are all digital, no fax machines in sight.
- Nuclear Weapons Taboo - Subverted since Hatsunia was part of the Allies in WWII and wasn't nuked. However, there were controversies surrounding the development and testing of Hatsunia's own nuclear weapons in the early 1960s. Hatsunia currently maintains a minimal stockpile for deterrence purposes.
- Operating System - Japan has no prominent operating systems, but Hatsunia has the "Symphony" operating system developed by Crypton Future Media (with thousands of employees in this universe instead of 30).
- Politically Correct History - Hatsunia, as part of a "half-and-half westernization" in the mid-19th century, adopted Western democracy, but not the racism, sexism, and imperialism of Western powers at the time. Hatsunia went on to befriend Korea (instead of annexing and oppressing it), and joined the Allies during WWII. This is intended to represent an antithesis to the brutality of Imperial Japan.
- Post-Cyberpunk - Hatsunia is a cyberprep version of the cyberpunk "Japan Takes Over the World (economically)" trope, with less of the "neo-Yellow Peril" connotations. There are big corporations, but they don't control absolutely everything, and "technology isn't screwing everything up."
- Pun - Hatsunia purchased the Micronesian islands from Spain (instead of taking it from Germany during WWI). Micronesia is pronounced "Mikuroneshia" (ミクロネシア, with a mee- sound) in
JapaneseHatsunese.
- The name of Empress Moeji (萌治) looks a lot like Emperor Meiji (明治) but with an extra radical. (Momiji and Moeji are spoofs of Meiji chocolate in KEI's Miku manga)
- The real-life company Rakuten ("the Amazon.com of Japan") means "optimism" (楽天). Ongakuten (音楽天) is a portmanteau with "music" (音楽). - Real Life Writes the Plot - Hatsunia's economy is handling the 2019-20 coronavirus pandemic much more effectively than Japan, with the use of telecommuting and no paperwork stamping requirements.
- Salaryman - Subverted as that kind of corporate culture discourages risk-taking and innovation (as opposed to the 1980s narrative of Japanese businesses taking over the world).
- Samurai - Similar to Japan, but everything diverges from the 15th century. Empress Momiji's government manages to take back de facto control from the military dictatorship (shogunate) during the "War of Lost Songs," and society gradually becomes less militaristic. There is no "closed country" (sakoku) period, just a period of non-interference, resulting in more exposure to foreign peoples and cultures and less ingrained xenophobia.
- Science Is Good - Hatsunia is a very science-and-technology-focused country, since in Japan, a lag in technological adoption is having a serious negative effect on economic efficiency.
- Space Station - HASDA has a modular space station called "Mirai," built in the 2000s.
- Surprisingly Good English - English became an official language in Hatsunia in 1967 to promote diplomatic and economic globalization.
- (meta reason: English is the lingua franca of computing, and was easier to handle on early computers compared to kanji) - Technology Porn / Techno Wizard / Thirty Seconds Over Tokyo - Hatsunia is heavily based on Japan's reputation as a country at the forefront of technology (see this compilation of articles). In reality, fax machines and stamped paperwork are still common in Japan, so Hatsunia aims to correct that and other weaknesses in Japan's tech scene.
- Tokyo Is the Center of the Universe - Miraito, the "Silicon Metropolis," is like Tokyo if it also had a booming and innovative IT sector.
- Trademark Favorite Food - Negi (green onions) are the signature food item in Hatsunia, like how they are associated with Miku in real life. Ancient rituals involved swinging or spinning a negi to music (especially to signify "the first sounds of the day"), and it came to be a symbol on the flag.
- Some prefectures are named after cities or towns with negi-themed mascots, like Yonago and Fukaya. - Virtual Celebrity - The page image is what Hatsunia is all about. But in this universe, Hatsune Miku isn't just a singing software character, she is also part of the folklore regarding the country's foundation.
- You Gotta Have Blue Hair - Students in Hatsunia can have any hair color they want, in stark contrast to the policy of a Japanese school which requires all students to dye their hair black. The latter policy has been criticized as the kind of attitude which prevents "thinking outside the box" and "stifles innovation," so Hatsunese schools are the opposite of that.