瀬戸内 List of Products and Services

Here is a case where 4mm mountain sand was delivered to a certain soccer field in the prefecture. Since the lines were drawn with lime, the field sand mixed with the lime and turned into a sticky mud, so we replaced it with "4.0 mountain sand" and paved it. It has been revived into a clean and solid field without foreign materials like shells, and it does not become sticky even when it rains, nor does it harden when dry, which has been greatly appreciated. 【Features of 2mm Mountain Sand】 It is a fine sand consisting of 70% medium grain and 20% fine grain, and the mountain sand is refined at our own manufacturing plant, containing a lot of weathered granite sourced from the mountains of Osogoe in Iwakuni City. It does not contain salt like sea sand, and because organic matter and fine soil are carefully washed and removed, it has received high praise as very clean sand. This salt-free and additive-free sand is used not only for plastering sand and construction materials but also as sand for golf courses, soccer fields, and baseball fields, as well as for sandpits in schools and parks, garden paving sand, and for cultivating natural yam. ■ Specifications - Mainly 1.0 to 0.4mm (2.28mm mesh) - Coarse particle rate 2.56 (April of the 7th year of Reiwa)

• Other park materials

We would like to introduce a case of delivering 2mm mountain sand to a certain golf club in Shunan City. "2mm mountain sand" is fine sand consisting of 70% medium grains and 20% fine grains. The mountain sand is refined at our own manufacturing plant and contains a high amount of weathered granite sourced from the mountains of Osogoe in Iwakuni City. It does not contain salt like sea sand, and because organic matter and fine particles are carefully washed away, it has received high praise for being very clean sand. This salt-free and additive-free sand is used not only as plastering sand and construction materials but also as sand for golf courses, soccer fields, and baseball fields, as well as for sandboxes in schools and parks, ground coverings, and gardening applications such as cultivating natural yam. 【Specifications】 ■ Mainly 1.0–0.4mm (2.28mm mesh) ■ Coarse particle rate 2.56 (April 2025)

• Other park materials

『山砂4mm』は、山砂は岩国市獺越(おそごえ)の山より採取した 風化花崗岩を多く含む真砂を自社製造工場にて精製しております。 海砂のような塩分を含まず、有機物や微粒土を丁寧に洗浄除去しているため、 非常にきれいな砂と好評を頂いております。 左官砂、建設用資材をはじめ、ゴルフ場・サッカー場・野球場の芝用砂、 学校や公園の砂場・グラウンド、お庭敷き砂、 自然薯などの耕作など 園芸用の砂としても使用されている無塩・無添加の砂です。 公共工事材料にも使用されており、材料試験表もございます。 また、品質に関する各種ご要望も承ります。 山砂4ｍｍの他にも、1ｍｍ、2ｍｍもご用意しております。 【規格】 ■主に2.4～0.6mm(4.35mm網) ■粗粒率2.97(R7年4月) ※詳しくはPDFをダウンロードしていただくか、お気軽にお問い合わせください。

• others

"Yama-suna 2mm" is a fine sand composed of 70% medium grain and 20% fine grain, sourced from weathered granite in the Osogoe mountains of Iwakuni City, and refined at our own manufacturing facility. It does not contain salt like sea sand, and we carefully wash and remove organic matter and fine particles, resulting in very clean sand that has received high praise. This salt-free and additive-free sand is used for plastering sand, construction materials, as well as for golf courses, soccer fields, baseball fields, sandboxes in schools and parks, garden sand, and for cultivating natural yam. It is also used in public works materials, and we have material test reports available. Additionally, we welcome various requests regarding quality. In addition to 2mm Yama-suna, we also offer 4mm and 1mm options. It is also used in public works materials, and we have material test reports available. Additionally, we welcome various requests regarding quality. 【Specifications】 ■ Mainly 1.0–0.4mm (2.28mm mesh) ■ Coarse particle rate 2.56 (April of the 7th year of Reiwa) *For more details, please download the PDF or feel free to contact us.

• others

『山砂4mm』は、微粒分少なく極めて細かい砂で、 山砂は岩国市獺越(おそごえ)の山より採取した 風化花崗岩を多く含む真砂を自社製造工場にて精製しております。 海砂のような塩分を含まず、有機物や微粒土を丁寧に洗浄除去しているため、 非常にきれいな砂と好評を頂いております。 左官砂、建設用資材をはじめ、インターロッキング目地、コンクリート2次製品の仕上用骨材、 挿し木培土、ゴルフ場グリーン芝用砂、サッカー場・野球場の芝用砂、 学校や公園の砂場・グラウンド、お庭敷き砂、 自然薯などの耕作など 園芸用の砂としても使用されている無塩・無添加の砂です。 公共工事材料にも使用されており、材料試験表もございます。 また、品質に関する各種ご要望も承ります。 山砂1ｍｍの他にも、4ｍｍ、2ｍｍもご用意しております。 公共工事材料にも使用されており、材料試験表もございます。 また、品質に関する各種ご要望も承ります。 【規格】 ■主に0.3mm(0.84mm網) ※詳しくはPDFをダウンロードしていただくか、お気軽にお問い合わせください。

• others

Decorative gravel is beautiful gravel used for decorative purposes in gardens and building exteriors. The decorative gravel "Yamazari (Kasumi) Large" is beautiful gravel with various colors and patterns. It is often used for garden ground cover, weed prevention in flower beds, finishing for bonsai, rock gardens, dry gardens, and interior applications. 【Features】 ■Size: 10–15mm ■Origin: Iwakuni, Kawaguchi *For more details, please download the PDF or feel free to contact us.

• stone

Decorative gravel is beautiful gravel used for decorative purposes in gardens and building exteriors. The decorative gravel 'Yamazari (Kasumi)' is beautiful gravel with various colors and patterns. It is commonly used for garden ground cover, weed prevention in flower beds, finishing for bonsai, rock gardens, dry gardens, and interior applications. 【Features】 ■Size: 5–10mm ■Origin: Iwakuni, Kawaguchi *For more details, please download the PDF or feel free to contact us.

• stone

Decorative gravel is beautiful gravel used for decorative purposes in gardens and building exteriors. The decorative gravel "Yamazari (Kasumi) Small" is beautiful gravel with various colors and patterns. It is commonly used for garden ground cover, weed prevention in flower beds, finishing for bonsai, rock gardens, dry gardens, and interior applications. 【Features】 ■ Size: Up to 5mm ■ Origin: Iwakuni, Dakeguchi *For more details, please download the PDF or feel free to contact us.

• stone

Masado soil is environmentally friendly and does not require chemical treatment. It compacts easily due to its ability to be compressed, making it suitable for use as a base for paving in parking lots, pathways, and parks, and it also has weed suppression effects as it makes it difficult for grass to grow. Our product is sieved through a 10mm mesh to ensure uniform particle size. It can be used as garden soil, vegetation soil, or field soil, and it contains a high amount of weathered granite sourced from Osogoe in Iwakuni City. No additives or mixed materials are used. The raw stone and soil are sorted to create the product. 【Specifications】 ■10mm under (10mm mesh) *For more details, please download the PDF or feel free to contact us.

• others

Masago soil is environmentally friendly and does not require chemical treatment. It easily solidifies through compaction, making it suitable for use as a base for paving in parking lots, pathways, and parks, and it also has weed prevention effects as it makes it difficult for grass to grow. Our product is sifted through a 6mm mesh to ensure uniform particle size. This masago soil contains a high amount of weathered granite from the Osogoe area in Iwakuni City, and it is free from additives and mixed materials. The raw stones and soil are sorted to create the product. It can be used for ground maintenance and finishing purposes. 【Specifications】 ■6mm under (6mm mesh) *For more details, please download the PDF or feel free to contact us.

• others

Guriishi refers to natural stones or rocks that have been split into stones of a certain size, while wariguriishi refers to stones that have been further processed from guriishi. We would like to introduce the "guriishi and wariguriishi" that we handle. We offer varieties such as "Yellow Brown," "Gray," "Black Green," "Stone Wash," and "Green." These stones are popular for rock gardens, dry gardens, garden stones, and flower beds, especially gabions, and we also accept inquiries for production and installation. 【Product Lineup (Excerpt)】 ■ Yellow Brown (Mountain Stone, Weathered Granite) ■ Gray (Rust Gray, Kinpu Sandstone) ■ Black Green (Black, Serpentine) ■ Stone Wash (Blue Stripe, Serpentine) ■ Green (Green, Green Serpentine) *For more details, please download the PDF or feel free to contact us.

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The mountain sand for golf courses, "White Sand," is refined from weathered granite containing a lot of granite from the mountains of Daskoshi in Iwakuni City at our own factory, and has been developed for use as topdressing sand and base sand for turf. "Mountain sand" does not contain salt like sea sand, and organic matter and fine soil are carefully washed away, making it suitable for use in vegetation. "Mountain sand 2mm" is currently being used at various golf courses in the prefecture as sand for golf course turf and bunker sand. Since it is produced in different grain sizes, the particle size distribution is uniform, and it does not put a load on turf machinery, thus not reducing work efficiency. Additionally, due to its moderate water retention, it is also suitable as topdressing sand for turf during the peak summer season. We offer a lineup of 4mm, 2mm, and 1mm to suit various usage purposes. It is used for turf sand in soccer and baseball fields, sandboxes and ground leveling in schools and parks, as well as for plastering sand, among other applications. 【Mountain Sand Product Lineup】 ■ Sand 4mm ■ Sand 2mm ■ Sand 1mm ■ Fine sand (10mm, 6mm) *For more details, please download the PDF or feel free to contact us.

• stone