On the morning of April 6, 1942, residents of Visakhapatnam witnessed unfamiliar aircraft circling above the city before sirens shattered the stillness. Japanese warplanes launched from the Imperial Japanese Navy light-aircraft carrier Ryūjō descended on strategic installations near the harbour, marking one of the most dramatic wartime episodes on India’s eastern coast.The bombing lasted only a few hours. Yet its impact transformed the city permanently.More than eight decades later, remnants of that turbulent period remained to be seen across Visakhapatnam. Some lie hidden beneath overgrown vegetation and expanding neighbourhoods. Others emerge unexpectedly along the shoreline after monsoon erosion and low tide. Together, they tell the story of a port city that briefly found itself on the frontline of World War II.Historian and chronicler Edward Paul, who has documented Visakhapatnam’s wartime past extensively, says fears of a Japanese occupation deeply affected both the administration and residents of the city. “There was an apprehension of a Japanese occupation of Visakhapatnam Port city, in the minds of authorities vested with the responsibility of protecting the city as well as in the minds of people living in the city,” he says.That fear shaped the city through the early 1940s.When war came to VizagWorld War II began in Europe in 1939, but by early 1942 the conflict had spread deep into Asia after the Japanese advanced through Malaya, Singapore and Burma. British authorities feared that India’s eastern coastline could become vulnerable to Japanese attack.Visakhapatnam, with its harbour and strategic location midway along the eastern coast, quickly assumed military importance.According to Edward Paul, Army, Navy and Air Force contingents began arriving in the city from 1940 onwards. Air Raid Precaution systems were introduced, trenches were dug, bunkers were constructed, and civilian evacuation drills were conducted. A Coastal Defence Flight was established in the city in February 1942, one of six such units set up along the Indian coastline, the others being located at Madras, Bombay, Calcutta, Karachi, and Cochin. The unit came into existence barely weeks before the attack.The fears became reality on April 6, 1942.Vizag’s concrete bulwarks bring back memories of threats from World WarThat morning, Cocanada, to the south, was bombed by a lone single-engine aircraft, becoming the first town in India to be raided from the air, as journalist-author and former Editor of The Hindu Mukund Padmanabhan recorded in his book The Great Flap of 1942: How the Raj Panicked Over a Japanese Non-invasion, published in 2024. Visakhapatnam was struck thrice on the same day and suffered considerably more.Aircraft from Ryūjō, operating as part of Vice Admiral Jisaburo Ozawa’s carrier force in the Bay of Bengal, attacked in three distinct waves. The morning strikes were directed at ships entering the city’s harbour. In the early afternoon, the first wave of five Type 97 bombers from Ryūjō hit the port. A further attack followed at dusk. The raids narrowly missed a ship berthed in the harbour carrying approximately 350 kg of explosives, a near-catastrophe that went largely unrecorded in popular memory.The human cost was significant. One bomb fell squarely on a shelter at the shipyard, killing five and injuring at least 40, among a total of at least eight killed across the day’s raids. Edward Paul says panic spread rapidly through the city in the aftermath. “Before the next sunrise, two-thirds of the people fled to the suburbs in bullock carts, bicycles, or whatever mode of transport that was available to them,” he notes.In his book, Mukund Padmanabhan also records that the exodus from Visakhapatnam had begun months before the bombing and that the raids of April 6, 1942, caused the town to be emptied.Rumours, evacuation plans and fear gripped several towns and cities as the British administration struggled to respond to the potential attacks by the Japanese.Comment | Forgotten in India after fighting from world trenches Pillboxes along the coastAmong the least documented wartime remnants in the city are pillboxes scattered along portions of the coastline.These small reinforced concrete defensive structures were built as part of British coastal defence preparations during World War II. Several remain partially buried beneath sand deposits and coastal vegetation.One such pillbox on the Beach Road seldom surfaces after the monsoon season, when soil erodes. Residents say the remains become more visible during low tide, offering glimpses of wartime defences that have otherwise disappeared beneath the city’s transforming coastline.Attention has also been drawn in recent years to the neglect of these wartime bunkers and pillboxes, many of which remain unconserved and unprotected.