Bing found the following results
Yari - Wikipedia
The Secrets Of The Yari: The Deadly Samurai Spear
The Yari: Exploring Japan's Premier Polearm Weapon
Overview of the Japanese Yari | MartialArtSwords.com
The Yari: Japanese Spear – Dojo Directory
Japanese Spears and Polearms Guide - Medieval Swords World
Yari: The Rise and Fall of the Japanese Spear
Yari Sword | Swords of Japan
Yari - Japanese Spear - Black Belt Wiki
Japan - Spear (yari) - Royal Collection Trust