Japan has its own distinct culture and a welcoming environment for Muslim tourists, making it a popular destination for them to explore. In addition to the Meiji Restoration era, Islam also flourished in Japan. The significant increase in the Muslim population in Japan is closely linked to the influx of people from different countries, particularly those with a predominant Muslim population like Turkey, Turkmenistan, Uzbekistan, Kyrgyzstan, Tajikistan, and Kazakhstan. Japan welcomes Indonesian Muslim tourists and recognises the importance of fostering cooperation in business practices between Indonesia and Japan to cater to their needs. This is crucial considering that the Japanese government does not have an official religion. Efforts to obtain halal certification are crucial for the growth of Japanese halal tourism, ensuring that halal food and drinks are readily accessible. The formulation of this research problem is how to foster the development of halal business practices between Indonesia and Japan by creating an environment that is accommodating to the needs of Muslim consumers. What is the potential of halal tourism in Japan in attracting foreign Muslim tourists by catering to their specific needs and preferences? This research employs an empirical juridical research method, specifically utilising existing laws and regulations to analyse Indonesian Japanese business practices. The aim is to ensure legal certainty, justice, and benefits in the context of halal tourism in Japan. To foster halal business practices in the context of halal tourism activities between Japan and Indonesia, it is imperative to prioritise being accommodating to Muslim individuals. An initiative aimed at catering to the needs of Muslim consumers is the certification process for halal food and beverage products.