To create a backyard that resembles a Japanese garden, several key elements can be incorporated. Start by planning for simplicity in terms of overall design and layout. Avoid excessive ornamentation or cluttered arrangements by focusing on minimalism instead. Integrate naturalness by incorporating organic materials like rocks, gravel paths, or bamboo fences into the landscape. Consider introducing water features such as small ponds or cascading waterfalls to bring an element of serenity to your backyard space.