Secret Door

Where to watch Secret Door in Japan

Secret Door is streaming on Netflix, U-NEXT and Netflix Standard with Ads in Japan. Availability checked 27 May 2026.

About Secret Door

Secret Door is a 2014 web series in the Drama, History and Mystery genres, starring Lee Je-hoon, Kim You-jung and Yoon So-hee. It spans 1 season and 24 episodes, and originally aired on SBS. It holds an average rating of 5.5/10 from 12 viewers. Below you can see where to watch Secret Door in Japan — across streaming, rental and purchase options — along with the full cast, trailer and viewer reviews.

Overview

A re-imagining of the legendary tale of the troubled father-son relationship between King Yeongjo and his only son Prince Sado. While his father insists on a strong and centralized government, Crown Prince Sado promotes social justice and equality throughout the kingdom. Throughout eight fateful years, the strain on their relationship — both familial and political — eventually evolves into a total breakdown, ending with one of the most tragic stories in Joseon history.

Seasons (1)

• Season 124 episodes · 2014

Top cast

Lee Je-hoon

Crown Prince Sado

Kim You-jung

Seo Ji-dam

Yoon So-hee

Seo Ji-dam / Park Bingae

Han Suk-kyu

King Yeongjo

Park Eun-bin

Lady Hyegyeong

Kim Min-jong

Na Chul-joo

Lee Won-jong

Park Mun-su

Kwon Hae-hyo

Seo Kyoon

Jeon Kuk-hwan

Lee Jong-sung

Jang Hyun-sung

Hong Gye-hui

Uhm Hyo-seop

Min Baek-sang

Kim Ha-kyoon

Kim Sang-ro

Choi Won-young

Chae Je-gong

Seo Jun-young

Shin Heung-bok

Ha Seung-lee

Queen Jeongsun

Park Hyo-ju

Woon-shim

Kim Tae-hun

Kang Pil-jae

Jeong Gyu-su

Yang Soon-Man

Kwak Hee-sung

Kim Moo

Jo Woo-jin

Lee Dal-seong

Themes & keywords

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