Kosa Collection – Self-Watering Pots & Planters

✦ Welcome to Ikigaiform — where Japanese minimalism meets parametric design. Every model is crafted to bring calm, organic beauty to your space. ✦

The Kosa collection takes its name from the cosine wave that shapes every surface. Each pot is built in Grasshopper from a single oscillating curve, repeated and wrapped around the form so that the pattern flows like ripples crossing still water — calm, rhythmic, never quite repeating.

Five models, three forms.

• Tsubo is the rounded bowl — full, soft, grounded. It hides a self-watering reservoir completely inside the wall, invisible from the outside.
• Suehiro is the tapered planter that fans gently outward toward the rim. It comes with a matching drip tray for classic top watering.
• Hira is the wide, low bowl made for succulents and shallow-rooted plants — a bonus form with the same self-watering system built in.

Models & dimensions:

• Kosa / Tsubo – Small (self-watering) — 162 × 162 × 120mm
• Kosa / Tsubo – Large (self-watering) — 250 × 250 × 185mm
• Kosa / Suehiro – Small (with tray) — 150 × 150 × 120mm
• Kosa / Suehiro – Large (with tray) — 250 × 250 × 200mm
• Kosa / Hira – Wide (self-watering, succulents) — 250 × 250 × 112mm

Print settings and modifiers are already included in each file. Just open, slice, and print.

⚠️ Do not scale these models (unless you know what you're doing). The modifier stacks for internal walls and layer height transitions are calibrated to these exact dimensions. Scaling will break those settings and affect both print quality and watertightness.

Note for your plants:

For best results, you can add a cotton or synthetic wick through the insert into the reservoir. The wick helps draw water up gradually, improving consistent moisture delivery and absorption at the root level. This keeps the growing medium evenly hydrated, reduces watering frequency, and supports healthier root development without the risk of overwatering.