Cobalt Sea-Lanes – Sasebo & Yeosu

About this cruise

Some of the best trips are the ones you barely had to plan. 5 nights from Keelung on August 11, 2026, visiting Sasebo and Yeosu, and you're home before the laundry piles up. The sea days at each end give the whole trip a natural arc: build-up, exploration, cool-down. Street food that'll ruin you for takeaway back home, ancient shrines, and cities that run like clockwork. Of the stops, Sasebo tends to be the one people talk about: Japan's naval city at the gateway to Kujukushima's 99 islands. Roughly 10 hours ashore per stop. No need to rush. Costa Serena carries up to 3,014 guests over 13 decks. Multiple pools, a theatre, and more restaurants than you'll get through. Families and groups will find plenty to do: waterslides, shows, multiple pools, and something for every age. If you can, add a night in Keelung before boarding. It's a good city to wander. And August means long, warm days. Good for the ports, good for the pool. Sometimes the best trips are the ones you just go ahead and book.