length · China / East Asia · Historical–modern

ken

exact

Record: M236
Definition quality: Standardized historical Japanese shakkan reference
Conversion mode: multiplicative
Calculator: Fully calculable

Label standardized shakkan reference, not every historical ken.

Definition

NDL conversion uses 6 shaku per ken, while its historical survey page warns older ken could use other shaku counts.

Reference value

One ken is equal to 1.81818 metres.

Modern use

Modern-use scope is context-dependent; the website should follow the record's current-status and regional/system labels rather than imply universal use.

Did you know?

A standardized calculator value can coexist with a historical-variants note.

Sources & evidence

Source tier Tier B/C — recorded secondary/reference source · confidence High for modernized shakkan

Related measurements

metre

length · International · Modern

SI base unit of length. Its definition fixes the speed of light in vacuum at exactly 299,792,458 m/s, with the second defined from the caesium-133 hyperfine frequency.