While Japan¡¯s video-game industry no longer dominates the world, there is still one niche of digital entertainment that this country does better than any other: romantic man-machine interaction.

Love with a virtual being is something plucked straight out of science-fiction. But in Tokyo¡¯s Akihabara district, hundreds of dating-simulation games are sold in stores, aimed directly at an audience of otaku (obsessive hobbyists). The most successful of these is the ¡°LovePlus¡± series, in which players strike up a relationship with an on-screen character and pursue her through daily interactions.

The games are on Nintendo¡¯s portable DS and 3DS consoles, allowing players to take their ¡°girlfriend¡± anywhere, and it unfolds in more or less real-time ¡ª meaning that if you make a date with your girlfriend at 7 p.m. next Friday, you¡¯d better boot up the game at 7 p.m. next Friday, or risk being chastised for standing her up. Much of the courtship takes place within a high school, with the protagonist and other characters as students, and flirting opportunities seized between lessons or in the library may result in dates somewhere further afield ¡ª which I¡¯ll come back to later. The actual relationship is played out through dialogue trees that allow the characters to chat about love and other affairs of the heart and mind.