Seiron
Monthly Seiron is a Japanese monthly opinion magazine brand whose online home is Monthly Seiron Online, offering articles, video/audio programs, events, and magazine sales.
Last updated September 15, 2026
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Overview
Seiron (月刊正論) is a Japanese monthly opinion magazine brand. Its online presence, Monthly Seiron Online (月刊正論オンライン), presents articles, video and audio content, events, magazine sales, and announcements, and describes itself as reading Japan's issues deeply and sharply. The site also promotes a newsletter service, Weekly Seiron Plus (週刊正論+), and video programs under the label Channel Seiron (チャンネル正論).
History
The official site of Monthly Seiron Online presents the brand as a monthly opinion magazine with an online presence. The site carries articles, video and audio content, events, magazine sales, and announcements, and promotes a newsletter service, Weekly Seiron Plus (週刊正論+), which it says starts on April 1. It also lists video programs under the label Channel Seiron (チャンネル正論) and events such as the 41st Seiron Grand Prize (第41回正論大賞) and the 42nd Shibaura Cup All-Japan Youth Debate Competition (第42回土光杯全日本青年弁論大会).
Products and positioning
Reads Japan's issues deeply and sharply (日本の論点を、深く・鋭く読む).
Monthly Seiron (月刊正論)
Monthly opinion magazine; the October issue is promoted as going on sale on September 1.
Monthly Seiron Online (月刊正論オンライン)
Online home of the brand, offering articles, video/audio, events, magazine sales, and announcements.
Channel Seiron (チャンネル正論)
Video/audio program label featured on the site.
Weekly Seiron Plus (週刊正論+)
Newsletter service said to start on April 1, delivered free every Wednesday.
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