赤口

Shakkō

“Red Hour”

largely inauspicious

Shakkō means "red mouth" or "vermilion hour" — and the redness historically referred to fire, blood, and the harm that can come from things spoken or done at the wrong moment. Of the six rokuyō, Shakkō has the most restrictive structure. Almost all of the day is inauspicious, with only a narrow window around midday (11:00–13:00) considered favorable.

If today is Shakkō, the wisdom is concentrated caution. This is not a day to schedule difficult conversations, to launch new things, or to take risks with words. It is a day to do small, attentive, careful work — and to schedule whatever genuinely cannot wait into the midday window.

In modern Japanese practice, Shakkō is the day many people avoid for legal proceedings, surgeries (when scheduling permits), and significant personal announcements. The midday window is sometimes used for unavoidable tasks; the rest of the day is for routine.

But Shakkō has a quieter teaching too. The redness in the name is not violence — it is the residue of fire, the trace of speech that has gone wrong. The day asks you to notice how you speak, what you commit to, what you set in motion through words. On Shakkō, every word matters more than usual. The discipline is to say less, with more care.

This is not a day to stay in bed. It is a day to move slowly, speak deliberately, and protect the small midday window for whatever cannot be postponed. The day is not against you. The day is asking for unusual attentiveness, and rewarding it with the quietest kind of safety.

Today's Time Structure

unfavorable except for the midday hour (11:00–13:00)

morning

unfavorable

midday

favorable

afternoon

unfavorable

Morning 6:00–11:00 · Midday 11:00–13:00 · Afternoon 13:00–22:00

Next 14 Days

赤口

先勝

友引

先負

仏滅

大安

赤口

先勝

友引

先負

仏滅

大安

赤口

先勝

Next Taian: July 3, 2026 (Friday)

Next Butsumetsu: July 2, 2026 (Thursday)

Shakkō's restrictive structure makes it the rokuyō most often used as a "negative example" in cultural commentary on the system's apparent arbitrariness. Yet the survival of Shakkō observance — particularly avoidance of major announcements on these days in older Japanese business culture — testifies to rokuyō's continued role as a coordination device. When everyone agrees a day is restrictive, the day functions as restrictive, regardless of cosmology.

About Rokuyō

What is Rokuyō?

Rokuyō (六曜) — literally “six days” — is a traditional Japanese system that assigns a quality to each day in a six-day cycle. Unlike the seven-day week imported from Europe, the rokuyō follows the rhythm of the Japanese lunisolar calendar and treats each day as having a particular character: when to begin things, when to wait, when to act in the morning versus the afternoon.

The system is not predictive in the way Western horoscopes claim to be. It does not tell you what will happen. It tells you what kind of day this is, and lets you decide what to do with that.

Where it comes from

The roots of rokuyō reach back to Chinese divination traditions, but the system as we know it today was shaped in Japan. It entered through the lunisolar calendars adopted from China during the Muromachi period (14th–16th centuries), began appearing in popular almanacs during the Edo period (1603–1868), and became a standard feature of printed calendars during the Meiji period when calendar publishing was modernized.

It is, in other words, both old and not as old as people sometimes assume. Rokuyō is not from the age of Heian poetry or imperial Kyoto courts. It is from the age of merchant towns, printed almanacs, and the ordinary scheduling of weddings, openings, and farewells.

How it works in modern Japan

Walk into a Japanese stationery store and look at any wall calendar — most will print the rokuyō for each date in small characters beneath the day. Most people in their daily life don't check it. But when something matters — a wedding date, a funeral, a business opening, a contract signing — many people will glance at it. Wedding venues charge premium rates on Taian days and offer significant discounts on Butsumetsu days. Many crematoriums close on Tomobiki, because the name itself (“pulling friends”) makes it inauspicious to bury someone on that day.

The cultural register is somewhere between seriously believed and politely respected. It is not science. It is not pure superstition either. It is a shared inherited rhythm, and most Japanese people relate to it the way they relate to other inherited rhythms — flexibly, with humor, and with occasional real attention when the stakes are high.

How Mikujin reads rokuyō

We do not treat rokuyō as fortune-telling. We treat it as a structure for thinking about the texture of a day — what kind of energy it carries, what it suggests about timing, what it asks of you. The day does not control you. But the day has a shape, and noticing the shape often makes the day go better.

Each of the six rokuyō has its own particular wisdom. Read for the day you are in. Then put the page down and live the day.