Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_39813 ( "Year" real, "Mission type" text, "Shogun" text, "Ry\u016bky\u016ban King" text, "Lead Envoy" text, "Number in entourage" text )

### Question ###
Who was the lead envoy of the mission with the Ry ky an King sh eki?

### Accurate SQL ###

SELECT "Lead Envoy" FROM table_39813 WHERE "Ry\u016bky\u016ban King" = 'shō eki'