As Chinese influence grows, Japanese warship visits Sri Lanka

* Kaga helicopter carrier docks in Colombo port

* Kaga drilled with Philippines, Indonesia, British navies en route

* Sri Lanka on key shipping lanes linking Asia to Mideast, Europe

* China, Japan navies extending reach in Indo-Pacific region

By Tim Kelly

COLOMBO, Oct 1 (Reuters) - Japan’s largest warship, the Kaga helicopter carrier, sailed into Sri Lanka's Colombo harbour this weekend, marking Tokyo's highest profile salvo in a diplomatic battle with China for influence along the region's vital commercial sea lanes.

Japan has long provided low-interest loans and aid to Sri Lanka, helping it transform Colombo into a major trans-shipment port tapping the artery of global trade just south of the island that links Europe and the Middle East with Asia.

Beijing has, however, emerged as a powerful rival across South Asia and beyond as it implements its Belt and Road infrastructure initiative.

Both China and Japan are also flexing their military muscles further from home. China's navy is increasingly venturing beyond the Western Pacific and into the Indian Ocean as it targets a world-class blue water fleet by 2050, while Japan's military diplomacy is flourishing under Prime Minister Shinzo Abe.

"Japan's government is promoting a free and open Indo-Pacific and this deployment in the Asia Pacific is a component of that strategy," Rear Admiral Tatsuya Fukuda, the commander of the Kaga and its destroyer escort, said in his cabin as the carrier steamed for Colombo through the Indian Ocean.

"Maritime security and stability is of critical importance" to an island nation like Japan, he added.

On its way to Sri Lanka, the 248 metre (814 ft) ship was shadowed by Chinese frigates in the South China Sea and carried out naval drills in the Philippines and Indonesia. It also drilled with a British Navy frigate before docking in Colombo on Sunday with 500 sailors and four submarine hunting helicopters aboard.

As part of the goodwill visit, the Kaga's crew also brought packets of colourful origami paper, crafting flowers for local children who came to tour the ship soon after it docked.

TUSSLE WITH CHINA

The visit was intended to reassure Sri Lanka of Japan's willingness and capability to dispatch its most powerful military assets to a region where China is growing in influence.

“Sri Lanka, as a hub in the Indian Ocean, and upholding its commitment to a free and open Indian Ocean, welcomes naval vessels from all our partner nations, to interact with Sri Lanka's Navy," said Sri Lankan foreign ministry spokeswoman Mahishini Colonne. "Several navy vessels from our partner countries have visited Sri Lanka this year already and the ship from Japan, a close bilateral partner, is welcomed in the same spirit.”