Cardano (ADA) launched the public testnet for its Leios scaling protocol on June 23, marking the network's most significant technical milestone in years. The launch comes as ADA trades at a five-year low of $0.16, down 95% from its all-time high of $3.09 in September 2021.
The Leios Musashi Dojo Testnet
The testnet, named Musashi Dojo after 16th-century samurai Miyamoto Musashi, is structured in five phases corresponding to the chapters of Musashi's Book of Five Rings: Earth, Water, Fire, Wind, and Void. These phases progress from basic design validation through adversarial testing and into mainnet readiness. The upgrade targets scaling Cardano from its current throughput of 4.5 KB/s to 200 KB/s, a 30 to 65 times increase over current Praos levels.
Input Output product manager Carlos Lopez de Lara confirmed the initial rollout starts at two to five times current throughput, with the full ceiling available as demand grows. The Leios governance proposal passed with over 84% support from Cardano's delegated representatives, and Lopez de Lara is targeting a November 2026 hard fork.
Price Struggles Amid Technical Progress
The launch lands in difficult market conditions. ADA has fallen roughly 35% over the past 30 days, hitting its lowest level in five years. The broader ecosystem has faced headwinds: analytics platform TapTools shut down earlier this year, Cardano cancelled its 2026 Singapore Summit, and founder Charles Hoskinson warned of a "wave of failures" among Cardano DeFi projects.
Cardano has lived through an unusual contradiction—the network kept shipping and moving toward its roadmap, but the price went nowhere. Leios removes the most persistent technical criticism of the chain: that the base layer cannot scale. The Cardano 2030 Vision requires scaling from today's roughly 800,000 monthly transactions to over 27 million, a goal the current base layer cannot achieve alone.
How Leios Works
Leios runs as an overlay on Cardano's existing Ouroboros Praos mechanism. When demand rises, an elected slot leader produces an additional "endorser block" that travels in parallel with the standard Praos block. Whether the market reprices over the next five months of testing, or waits for mainnet, remains the question that defines Cardano's second half of 2026.