As a Japanese passport holder, you're in luck for your upcoming trip to Luxembourg, as a visa-free entry allows for a comfortable 90-day stay within the Schengen Area. This means you can explore the picturesque landscapes and charming cities for up to three months without the need for a specific visa, though it's worth noting that both tourist and work visa options are technically available should your plans extend beyond this allowance. While the cost of daily living can be higher than in Japan, familiarizing yourself with the Euro (€) will ease currency exchange during your travels, and planning your visit outside of the peak summer months of July and August might offer a more tranquil experience. Given Luxembourg's central European location, flights often connect through major hubs like Frankfurt or Paris, making travel from Tokyo to Luxembourg a relatively straightforward, albeit time-consuming, journey.