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The following is a list of the date of the start of the Japanese eras in chronological order. Note that not all alternate readings of era names have been indicated. For more information read the article on [[Year dates]].  

The following is a list of the date of the start of the Japanese eras in chronological order. Note that not all alternate readings of era names have been indicated. For more information read the article on [[Year dates]].  

"Periods" and "ages" are determined by historians. The general periods are pretty much agreed upon, but usually the start or end involved several pivotal events which could reasonally be said to demarcate the period. For more information, see the notes.  Some vague "periods" as the Sengoku Period <ref>戦国時代, "Period of the Warring Nation" or "Warring Provinces." Start: [[Onin War|Ônin War]] ([[1477]]), [[Hojo Soun|Hôjô Sôun's]] invasion of [[Izu province]] ([[1493]]), or somewhere between; end: [[Oda Nobunaga]]'s entrance into [[Kyoto]] ([[1568]]), [[Toyotomi Hideyoshi]]'s unification of the country ([[1590]]), [[Osaka Campaign|fall of Osaka Castle]] ([[1615]]). </ref> are not listed.  For art periods, see Nelson's ''Dictionary''.

"Periods" and "ages" are determined by historians. The general periods are pretty much agreed upon, but usually the start or end involved several pivotal events which could reasonally be said to demarcate the period. For more information, see the notes.  Some vague "periods" as the Sengoku Period <ref>戦国時代, "Period of the Warring Nation" or "Warring Provinces." Start: [[Onin War|Ônin War]] ([[1477]]), [[Hojo Soun|Hôjô Sôun's]] invasion of [[Izu province]] ([[1493]]), or somewhere between; end: [[Oda Nobunaga]]'s entrance into [[Kyoto]] ([[1568]]), [[Toyotomi Hideyoshi]]'s unification of the country ([[1582]])<!--Hideyoshi took over from Nobunaga in 1582, though Odawara (the Hojo) didn't fall until 1590. Which event is this "unification" year referring to?-->, [[Siege of Osaka Castle|fall of Osaka Castle]] ([[1615]]). </ref> are not listed.  For art periods, see Nelson's ''Dictionary''.