Osekkai] is known for its products made in collaboration with various makers. The newly introduced amber sugar SORA AI was created in collaboration with Ai Horikawa, a food designer active in food styling and product production, and Wataru Kanaya, a Kyoto sweets artisan.

The lineup includes four types of amber candies, so beautifully colored that they are almost too good to eat: 5:00 a.m., dawn, when the sky gently fades to white; 9:00 a.m., early morning, when soft clouds float in a clear blue sky; 6:00 p.m., dusk, when the sun sets and the sky slowly melts into darkness; and 11:00 p.m., midnight, when the stars twinkle in the night sky over the Milky Way. is midnight, when stars twinkle in the night sky with the Milky Way in the background.

The bright colors of amber sugar are all derived from natural ingredients, as the company wants to use the best possible ingredients for the body. One bite is crispy on the outside and soft like jelly on the inside, providing a contrasting texture.

The "small window" package is a romantic design that expresses "looking at the sky from inside a room. The gradation is beautiful and pleasing to the eye, making it a perfect souvenir or gift.

［What is [Nazuna]?
［The company operates luxury ryokan and high-end single-bedroom inns in renovated machiya townhouses under the brands "Nazuna" and "Kiraku". The company offers traditional yet creative lodging, including "Nazuna Kyoto Nijo Castle," which won three pavilions in the Michelin Guide Kyoto/Osaka 2020, and "Kiraku Kyoto Anekoji," which won 8th place in the 2018 Nihon Keizai Shimbun's "Experts' Choice Ranking of Old Machiya Townhouses in Japan.