Shoin Yoshida is worshipped here. Originally, a Shoshi (small shrine covered with plaster) was built in 1890 in the Sugiya premises (residence of Shoin's parents), and Akamasuzuri (an ink slab which Shoin used regularly) and was dedicated as a Reidai (token of the spirit) to the Shoshi to worship his spirit. In 1907, the Miyazaki Hachiman shrine (located in the ruins of Hagi castle), which embodied Mori's guardian deity, was dismantled and moved to Shoin Shrine to build a Honden (main hall) for the present. The shrine was graded as a Kensha (prefectual shrine). The original Shoshi is now in Sessha Shomon-jinja Shrine, located next to the Shoin-jinja shrine to the north. This now honors Shoin's students who studied in his school, Shokason juku. The Shokason juku (designated as a national historical site), Shoin's house where he was confined, and the Hagi Shoin Museum are in the compound of the Sessha Shomon shrine. Shoin's testament “Isho Ryukonroku Ethat Shoin wrote before he was executed is displayed in the museum.

The district called Horiuchi is situated in the Sannomaru area of Hagi Castle ruins. The district has approximately 77.3 hectares, 990 m (east-west) by 660 m (north-south). The clan offices such as Okuramoto (the place where the merchants comes for their business, Okiya (the place where timber are stored), Shogungoyou yashiki (houses which Shogun use), Gozendokoro (the place to cook), and Okachidokoro (the place where Kachi samurais stay) were settled in this district in the period when the clan held governance. Also, the Mori's relatives and superior ranked feudatories, such as the Eitaigaro (first rank feudatoies) and Yorigumi (second rank feudatories), lived in this area. The Monomi yagura (watch tower) of the Masuda residence (an Eidaigaro who was assigned 12,000 goku), the Nagayamon (terraced house front gate) of the Sufu (1,530 goku) residence, the Nagayamon of the Hanzawa (1,094 goku) residence, the Yashikimon (mansion front gate) of the Fukuhara residence (an Eidaigaro assigned 11,300 or more), and the Omotemon (front gate) and the main building of the Kuchiba (1,018 goku) residence are well preserved. Natsumikan trees (Orange trees which bear in summer) were planted around in these sites to save samurais from poverty after Tokugawa Shogunate period ended. Altogether, the historical scenery of the district is very beautiful.

Hagi Castle Town has been designated as a national historical site. The town was originally constructed on a grid where many middle and lower ranking samurai houses and merchant houses stood in rows. The street lines of the time still remain without change, and the town retains traces of its former appearance. The house of the Kikuya, a wealthy merchant family of the feudally-appointed supplier of commodities in Hagi, the birthplace of Shinsaku Takasugi, and the houses of Takayoshi Kido and Shusuke Aoki are preserved in the smaller alleys called Kikuya-yokocho, Iseya-yokocho, and Edoya-yokocho. Along of the streets are storehouses with Namako kabe (the walls covered with square tiles jointed with raised plaster), house gates, and clay fences.

This museum displays an excellent collection of Ukiyoe prints, oriental potteries and porcelains donated by Toshiro Uragami, a businessman who was born in Hagi. The museum houses about 4,800 ukiyoe prints including the pieces from the 6 great Japanese Ukiyoe artists, Hokusai Katsushika, Harunobu Suzuki, Kiyonaga Torii, Utamaro Kitagawa, Sharaku Toshusai, and Hiroshige Utagawa. The Utagawa-school collection is the most remarkable among them. As for the ceramic collection, pieces from 3000 BC to the mid-17th century (spanning approximately 5,000 years) are stored. The excellent collection comprising Saito (Chinese ancient ceramics with colored patterns), Kosometsuke (porcelains made in Jingdezhen at the end of the Chinese Ming period), Ryokuyu (from the Chinese Han period), Karasansai (from the Chinese Tang period), and Kosometsuke (from the Han to Ming periods) and others are listed.

Located in Mt. Kasayama in the Koshiga-hama area of Hagi city, Hagi Glass Atelier manufactures local brand crystals using quartz basalt mined from Mt. Kasayama. This is also a place to research about Hagi glassware. The features of Hagi crystal are its moss green color, its hardness and durability, and tolerance of heat. Visitors can see the production process.

The Kawashima district where lower-ranked samurais were living is situated on the delta of land where the Abu river branches into the Hashimoto and the Matsumoto rivers. The Aiba river runs through the delta snaking 2.6 km. The water from the Aiba river was available only for agriculture, households, and fire-fighting until 1744 when Munehiro Mori, the 6th lord of the clan, cut the channels for commercial use. Since boats could be used on the river channels, commodities such as wood-fuel or charcoal were delivered through the channels. The river had been called Oumizo, but people was unaware of calling this river the Aiba river because the regionally-run Aiba (a place to dye fabric with indigo) was settled by the river and the water became navy blue from Ai (indigo plant). Along the Aiba river, the washing place called Hatoba and the arched stone bridge still remain and show signs of the past. The landscape of the Aiba riverside is one of the rare places to remind us of life as it was in Hagi castle town. Thelandscape has been appointed as a preserved historical area.