The Meirin basic weapon bag without shoulder Strap is available in three versions:

H1 : For 1 Shinai or Bokuto, 140cm x 7.5cm.
H2 : For 2 Shinai or 2 Bokuto, 138cm x 11.5cm.
H3 : For 3 Shinai or Aikido Weapon Set, 147cm x 15cm.

The weapon bag H1 and H2 are with pattern of Iris flowers on dark green background, color of pine needles (Chitose Midori 千歳緑), symbol of immortality and immutability.
The cover H3 is with Iris pattern on dark blue background, indigo color (Ai Iro 藍色), color of tranquility and harmony.

Fabric: 100% Fine Cotton.
Location for Label Nominative.
Low end lined in Faux Leather.
Side Opening on Top.
The upper part, when folded down, serves as a pocket to put the accessories (Tsuba and Tsubadome).

Iris pattern, Shōbu 菖蒲:
The Japanese Iris (Shōbu 菖蒲) is now a symbol of good news and loyalty to Japan.
According to Yushichi Uehara, President of Inden Ya (lacquered pattern craftsmanship), 13th generation direct lineage craftsman and director of the Inden Museum, the Shōbu pattern dates back at least to Sengoku Jidai (1467-1573). The cross represents the iris flower, and the lines on both sides are its leaves.
Iris has a long tradition of use as a medicinal plant, and was used to protect against both demons and epidemics. It is also a symbol of male strength, so this pattern was often used on armor and helmets.This association with health and strength is the reason why the Japanese always take a Shōbu no Yu (an Iris bath) May 5, adding clusters of iris to hot water. Today is a holiday called Kodomo no Hi (Children’s Day), established in 1948, the origin being the Tangu no Sekku (Boys' Festival), and this iris bath was a way to pray for the male child to grow up well.

It is also a Goro Awase (語呂合わせ pun) that the Japanese love. Shōbu writes 尚武 means militarism/warrior spirit; Shōbu writes 勝負 means victory or defeat today, while it means battle at uncertain outcome in a martial context.

One can observe the flowering of the Iris in June at the Meiji Shrine of Tōkyō. Meiji-jingū (明治神宮) is the largest Shintō sanctuary, located in the center of the imperial garden which contains a 1500 iris field.