Genkō — era names, Mongol invasions, and manuscript paper

Era names (nengō)

In Japan the word Genkō has been used as the reading for two separate era names (nengō). One is written 元亨 and covered the early 1320s; another is written 元弘 and was in use during the early 1330s. Era names are chosen to mark periods in an emperor's reign or major events, and identical-sounding readings with different kanji are not unusual.

• Genkō (元亨): the earlier era, placed in the early 1320s and part of the late Kamakura period context.
• Genkō (元弘): the later era, overlapping a turbulent decade that included the uprising led by Emperor Go-Daigo (often called the Genkō War) and the eventual fall of the Kamakura shogunate.

Genkō as the Mongol invasion (元寇)

The compound 元寇, also pronounced Genkō, is a historical label for the two large-scale attempts by forces from the Mongol-led Yuan dynasty, with Korean (Goryeo) participation, to invade the Japanese islands in the late 13th century. These expeditions, commonly dated to the 1270s and 1280s, tested coastal defenses and had significant long-term effects on military organization and coastal fortifications in Japan.

Several features are often emphasized when discussing these invasions:

• They involved combined Yuan and Goryeo fleets attempting amphibious landings against Kyushu and other parts of western Japan.
• Storms and logistical difficulties played a decisive role; storms that wrecked large invasion fleets were later celebrated in Japanese sources and labeled "divine wind" or kamikaze.
• The invasions prompted administrative and military reforms and influenced samurai culture and coastal defenses during the Kamakura period.

For a concise historical overview see Genkō (the invasions).

Genkō yōshi (原稿用紙): manuscript paper

Genkō yōshi is the name for ruled manuscript paper used for writing Japanese. The standard sheets are divided into a grid of squares, each intended to hold a single character, and are used in schools, by authors, and for formal manuscript submission. Configurations vary; common sheets provide a few hundred squares arranged in columns suitable for vertical or horizontal writing. The page layout helps writers maintain consistent character spacing and margins.

Templates and examples of this paper are widely available; publishers and educators still use it for practice and reservation of manuscript format. See an example at Genkō yōshi.

Distinctions and usage notes: because "Genkō" represents several different kanji compounds—元亨, 元弘, 元寇, 原稿用紙—context is essential to determine the intended meaning. In modern discussion, scholars and readers usually rely on the kanji or the surrounding topic (chronology, military history, or stationery) to disambiguate the term.