Although largely unaffected by the powerful quake, Chan said groups may need to adjust their itineraries.
The quake caused partial building collapses, building fires and toppled walls A 9-year-old girl and two men in their 80s were the reported dead.
The magnitude-6.1earthquake, initially measured at 5.9, struck the region, 400 kilometres west of Tokyo, during the morning commute. The quake also grounded flights in and out of Osaka, and paralyzed traffic and commuter trains most of the day.
Huen said his agency had four to five tours heading to Osaka daily, and at the moment they would not be cancelled.
The natural disaster halted train and subway service.
The epicenter of the natural disaster was in the northern part of the prefecture, the Japan Meteorological Agency said.
The largest tremors, a weak 6 and 6.1 on the Japanese seismic scale, were detected in the northern area of Osaka prefecture, according to the Japan Meteorological Agency.
A nine-year old girl killed by a falling wall at her school was one three confirmed fatalities.
Multiple small aftershocks followed the quake, and an official from Japan's meteorological agency warned residents to remain on guard.
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Myotokuji temple is destroyed by an quake registering a weak 6 on the Japanese seismic scale in Ibaraki City, the north side of Osaka Prefecture on June 18, 2018.
Train and subway service including the bullet train that links Osaka to Tokyo was stopped have been suspended to check for damage to equipment.
Steve Huen Kwok-chuen, executive director of EGL Tours, said its travel agency had more than 10 tours in Osaka, and all had reported in as being safe.
Television images showed buildings swaying and burst pipes spewing water after the quake, which struck at the height of rush hour in the city of around two million people.
The auto manufacturer Daihatsu said it had suspended operations at its plants in Osaka and nearby Kyoto, while the consumer electronics firm Sharp said its factories were operating normally.
Honda Motor Co. and Mitsubishi Motors said they were resuming operations after suspensions and safety checks.
The quake hit western Japan early Monday, but there were no immediate reports of major damage or risk of tsunami waves, officials said.
JXTG Nippon Oil & Energy Corp. said a refinery in Osaka Prefecture operated by one of its subsidiaries suspended production and shipments.
The latest disaster has reminded many in Japan of the magnitude 7.3 Hanshin-Kobe quake that killed more than 6,000 people in the same region in 1995.