* For today’s entry, Patricia Telesco names “Chiu-Rang-Guru” as today’s Goddess. However, my research revealed that Chiu-range guru is a river demon. “This demon is a male, and his wife’s name is Chiu-range mat”.  So, today’s Goddess entry, I will be focusing on Chiu-range mat.
“[Chiu-range mat’s] themes are water, beauty, overcoming and victory. Her symbols are rough water and light. This Goddess dwells in rapids, rough water, or waterfalls, and She can guide us through any rough waters that our lives face. Her name literally means [‘the descending current’]. Thanks to water spirits like Her, Niagara Falls has become a favorite tourist attraction, especially during this festival, The Festival of Lights.
This breathtaking festival takes place nearly in my backyard. At this time of the year, Niagara Falls is bedecked with hundreds of lights, including colored floodlights that adorn the falls in potent beauty, accented by the Goddess’ vibrant power.
If you find yourself facing difficult times right now, know that [Chiu-range mat] can ease the flow of problems. One way to magically mimic this is by using a freestanding Jacuzzi in the tub turned on high. Immerse yourself in this torrent, then speak the Goddess’ name and turn it down slowly. When you’ve reached the last setting, turn off the machine and pull the plug in the tub, letting those problems literally flow down the drain. The effect of this activity can be accentuated by using a black light in the bathroom, glitter in the water, and candles. This turns your tub into a light show in which you can wrap yourself in [Chiu-range mat’s] spirit and be renewed.”
(Patricia Telesco, “365 Goddess: a daily guide to the magic and inspiration of the goddess”.)
I could not find much on either Chiu-range mat or Her husband, Chiu-range guru. From what little information I could find during my research revealed that they come from Ainu folk-lore and belong to a class of river demons. In the Encyclopaedia of Religion and Ethics, Volume 1, it states: “The river demons are also very numerous, and their names indicate their work. They are: Konupki-ot-guru, or ‘dwellers in muddy places.’ They are said to reside specifically near the river banks. Chiuka-pinne Kamui rametok (‘the brave and divine male current’) comes next. Then ther are Chiu-range guru and his wife (‘they who send the current’), and Kochiu-tunash guru with his wife, i.e. ‘persons of swift current,’ and others too numerous to mention. The river deities are called Wakka-ush-Kamui (‘water gods’). All rivulets and tributaries are said to be their offspring. They are named Kamui poteke, i.e. ‘the little hands of the deities,’ and Kamui matnepo, i.e. ‘daughters of God.’ Then there is Petru-ush-mat (‘the female of the waterways’), together with Pet-etok-mat (‘the female source of rivers’). Mermaids are called Pe-boso-ko-shinpuk, i.e. ‘mermaids who pass through the water.’
They are also called Mimtuchi and tumunchi, i.e. ‘fat’ and ‘fleshy devils.'” 
Among the Ainu, besides the gods is “another category of deities…evils spirits or demons, who are more powerful than humans and cause illness and tragedies. They can be overcome by divination and rituals performed through a shaman.” 
Coming back now to Chiu-range guru and Chiu-range amat, they are said to “reside among the stones where river currents fall over somewhat rapidly. Saké is never drunk to them, and they are never prayed to, though small inao are sometimes offered to them” (Batchelor, p. 544.)
Batchelor, John. The Ainu and Their Folk-lore, “River Demons” (p. 544).
Selbie, John Alexander, James Hastings & Louis Herbert Gray. Encyclopaedia of Religion and Ethics, Volume 1, “AINUS; 21. Gods and demons of the sea and rivers” (p. 244).
Suite101.com, “Religion Among the Ainu People of Hokkaido Japan“.
Ainu-museum.or.jp, “Ainu History and Culture“.
Sacred-texts.com, “Specimens of Ainu Folklore by John Batchelor“.
Wikipedia, “Ainu people“.