This very realistic papercraft is a Unadon (Eel Bowl), designed by wombat. Unadon is a dish originating in Japan. It consists of a donburi type large bowl filled with steamed white rice, and topped with fillets of eel grilled in a style known as kabayaki, similar to teriyaki.
That is to say, the fillets are glazed with a sweetened soy-based sauce, called tare and caramelized, preferably over charcoal fire. The fillets are not flayed, and the grayish skin side is placed faced down. Plenty enough of the tare sauce is poured over so that some of it seeps through the rice underneath. By convention, pulverized dried berries of sanshō are sprinkled on top as seasoning. Variations include unajū, nagayaki, and hitsumabushi.
There are two styles of grilled eel, the topic of which is covered more precisely under kabayaki. Essentially, in the Kantō region style, the eel is steamed before being grilled with sauce, which makes the eel more tender. The other is the Kansai region style, which is grilled without steaming. Also, traditional Kanto style sliced open the eel down the back and not the belly.
Una-don was the first type of donburi rice dish, invented in the late Edo Period, during Bunka era (1804-1818) by a man named Imasuke Ōkubo of Sakai-machi, and became a hit in the neighborhood, where the Nakamura-za and Ichimura-za once stood.
The first eaterie to sell it as a business is claimed to be Ōnoya, Fukiyachō at some indeterminate time, but presumably before the theaters burnt down in 1841 and moved off. After the great famine of 1844, it started selling the una-don for one oblong Tenpō-sen coin, and became a hit.
As for unajū, where the eel and rice is stuffed in jūbako boxes, one theory ascribes its originator to one Gihei, who started a freshwater fish restaurant business in Sanya, Asakusa, Tokyo called Funagi. According to this version the unajū was already around by late Edo period, but there are detractors to this view. Other commentators say unajū appeared in the Taisho era, and by using lacquered boxes, aimed at appearance of luxury. Unajū is usually pricier than unadon. [Source: Wiki]
You can download this paper model here: Japanese Food Unadon (Eel Bowl) Papercraft Free Template Download