Shinboku

A shinboku (神木) is a tree or forest worshipped as a – a physical object of worship at or near a Shinto shrine, worshipped as a repository in which spirits or  reside. They are often distinctly visible due to the wrapped around them.

The related term refers to trees that are considered sacred or divine in the precincts of Shinto shrines and  of Shinto, as well as the forests that surround them and trees that are not grown for logging. It also refers to trees that are owned by shrines or by private individuals and have a special origin in folklore. It may also refer to trees that have been specially cut down for planting or growing wild to be used as timber for the construction of shrines.

Overview
Nature worship, also known as Himikura Shinto, is a part of the ancient Shinto religion that originated in Japan. This form of worship is based on gratitude, fear, and respect for, life, and nature. Ancient Shinto practices involved using symbolic objects, such as trees, in places where the environment changed as vessels for Shinto bodies.

Over the course of thousands of years, the form and style of Shinto shrines and rituals have been influenced by foreign religions or established independently, leading to the development of various forms of Shinto. Today, there are tens of thousands of Shinto shrines in Japan, many of which were built on the site of shrines in ancient Shinto religion. These shrines may contain sacred trees,, rock formations, steles, or mounds, and serve as a testament to the history of nature worship in Japan.

In some cases, shrines may not have a physical structure, but rather worship a sacred tree in its natural state. Evergreen trees with pointed branches are often used as in Shinto rituals, serving as a substitute for the gods to descend from. The most common type of is the  tree, but other species such as  and  may be used in regions where  does not grow naturally (areas north of the Kanto region).

In general, a is a branch that has been cut down to be offered to the gods, while a sacred tree is one that is still rooted in the earth and worshiped by many people.

, also known as, are considered to be of the gods, and are given special treatment, being decorated with. The is a  of the gods, and is also decorated with. Many of them are, , and cedar.

In addition, some trees are treated as sacred trees, such as the cedar trees at Ise Grand Shrine, which are regarded as special trees separate from the gods in order to maintain the scenery or create a solemn atmosphere. For those who work in the mountains, a tree that stands out as a substitute for the god of the mountain may be temporarily treated as a sacred tree and enshrined.

The, which is used in Shinto rituals and is made from and , is also called a sacred tree, but it was originally a simple substitute for a naturally occurring sacred tree in ancient Shinto.

Divine realms and boundaries
In ancient Shinto, the Shinto shrine was considered to be a Shinto shrine as a place where the gods dwelled, or a boundary between the everlasting world and the present world, and was feared and respected. In order to prevent people, things in this world, gods in this world, and things that bring misfortune and evil to this world from easily coming and going, were hung as walls, making it a forbidden place. Even today, there are many places such as Okinoshima Island where not only the shrine, the sacred tree, or the forest of the local guardian, but the entire island is forbidden. In some places, rituals and festivals are held for a certain period of time when people want to bring good fortune and invite the gods in.

Memorial tree
Memorial trees are trees donated by people who are related to the shrine, which are considered sacred and are treated as sacred trees.

Construction tree
When building a shrine, the trees that will be used for its lumber are treated as sacred trees.