Why was Sakai an important port during the 15th and 16th centuries?

Sakai was a prominent commercial hub and seaport from the mid-14th to the mid-17th century, reaching its peak importance during the 15th and 16th centuries. Its significance was driven by several key factors:1

• Lucrative Trade: Sakai’s wealthy merchants engaged in extensive foreign and domestic commerce, trading with China, Korea, the Ryukyu Islands, and Europe.12
• Self-Governance: The city functioned as a largely autonomous "free city," administered by an assembly of 36 leading merchants drawn from wholesale guilds. This independence allowed the city to maintain its own defenses, including moats and soldiers, and to resist domination by local warlords (daimyo).32
• Cultural Influence: Following the devastation of Kyōto during the Ōnin War, Sakai became a vital center for the arts under the patronage of its affluent merchant class.2
• Cosmopolitanism: Jesuit missionaries of the era noted the city's wealth and flourishing condition, often comparing its self-governing status to the free cities of medieval Europe.32