How Mokuromi works

A mokuromi is a tool for looking at a business idea in numbers. Not a precise business plan — the point is to quickly feel out whether a shape like this could work.

Getting started

Start from "Create a new mokuromi" with a blank sheet, or choose a nearby pattern from Company, Independent, or Side business and swap in your own numbers. The estimate can run 3 to 600 months (up to 50 years). Extend the period, and any item that was running through the final month stretches with it. Choose currency from the options shown in the editor — it belongs to each mokuromi, not the language.

Money coming in

Revenue can be entered in five shapes.

• One month only — money that lands once, in a specific month — a grant, a one-off sale.
• Every month — money that repeats through the period — retainer fees, rental income.
• Price × count — a business that runs on unit price times customer count. Enter a monthly count directly, or break it down into "per day × days". Switching between the two keeps whatever you typed in each.
• Borrowed money — a loan. It lands in one lump sum, in the month you choose. Set a repayment plan and a monthly repayment (interest included, equal payments) goes out from a chosen month. It's not revenue, so it's never a target for sales-linked costs. Recovery is judged on the business alone; cash including the loan is overlaid as a dashed line.
• Invested money — money you take as investment. It lands in one lump sum, in the month you choose. You don't repay it — instead you give up a share of the company. VC, angel, and family money are all the same here. It's not revenue, so it never enters the P&L or recovery judgment. The implied valuation and remaining founder ownership show up on the RECOVERY chart.

Money going out

Costs come in six shapes.

• Initial investment — money spent once, before you start — fit-out, equipment. Payback is judged against this amount.
• Every month — money that repeats through the period — rent, utilities.
• One month only — money that goes out once, in a specific month.
• Revenue-linked — costs proportional to revenue — materials, payment fees. Enter a percentage directly, or derive it from cost per sale ÷ sale price. Apply it to all sales or one specific income item.
• Labor — a panel for registering people and adding them up. Combine hourly rate × hours (part-time) and monthly pay × headcount (staff).
• Purchases — a panel for registering items you buy and adding them up. Enter a flat amount, or unit price × quantity. Switch each one between "one month only" and "every month".

Reading the chart

• Verdict (the dark band at top) — the profit or loss over the estimate period, and the point where it dips lowest. Read the other way round: that's how much of a cushion would get you through the trough.
• PROFIT BRIDGE — the bridge from revenue down to profit or loss, after costs. Revenue is colored by type.
• MONTHLY FLOW — every month, how much comes in and how much goes out? Collapsed by default — open it to see the monthly stack and the profit-or-loss line.
• RECOVERY — the cumulative line. It starts out carrying your initial investment; the month it crosses zero for good is "stable payback". When there's investment, the valuation and remaining founder ownership show up here too.
• Monthly table — every month's numbers. If a month in the chart catches your eye, check it here.

Tools for trying things out

• Exclude from totals — drop an item from the totals without deleting it. Test "what if I stopped this" in one click.
• Advanced projection — add a month-over-month rate of change (%) to "every month", "price × count", or personnel items. Revenue items call it a growth rate, expense items a change rate, and personnel a raise rate — all of them can go negative. Choose monthly or annual, and optionally limit it to a date range. Uncheck it to revert anytime.
• Reorder — reorder panels with ↑↓. On a computer, you can also drag by the handle.

Advanced analysis

Collapsed at the bottom of the left column. Only the metrics you open show up — your own instrument panel.

• Finance — IRR (annualized return), NPV (shown once you enter a discount rate), gross margin.
• Startup — average burn rate, required reserve, runway (shown once you enter cash on hand), MRR, MRR growth rate.

All of these are reference values. At this scale of mokuromi, use them to catch a trend, not to forecast precisely.

What happens when you change currency?

Currency is set per mokuromi. When you switch, you can convert by exchange rate — fetched automatically, or typed in by hand. Convert back to the original currency and the pre-conversion numbers are restored. You can also change only the currency label and leave the numbers as they are. Switching language never changes currency.

On a phone

The same mokuromi works when the screen is small.

• Switching charts — use the left/right arrows or a swipe. "Document ▸" switches to a reading layout.
• The panel below — edit the premises in the panel at the bottom. Tap a number to open the dedicated keypad — with 万 / 00 keys and "Next" for entering several fields in a row.
• Reorder — tap the left edge of a panel, then use ↑↓ to reorder.
• Exclude from totals — check it to drop an item from the totals without deleting it.

How saving works

Your data is saved only inside the browser you're using right now. Phone and computer, Safari and the in-app browser inside LINE — each keeps its own shelf.

• Saved only after you edit — Opening a template or "New mokuromi" does not save it yet. The moment you change anything — a number, a name, an item — it lands on the shelf and auto-saves from then on. Leave without editing and nothing remains. Opening a mokuromi that was already saved works as before: it's always a save target.
• Export all and import — Anything worth keeping, write out as JSON with "Export all". On a phone, the share sheet lets you pick "Save to Files" and the like. Import brings it back anytime. Clear your browser's data and the shelf clears too.
• Share as poster — embeds the mokuromi in a URL you can hand off. Whoever opens that URL gets their own copy, free to change the numbers.

Pricing

Everything is free right now. Any paid features later will be shaped by listening to the people using it. About pricing